For Legal Professionals
For Patent & IP Attorneys
Resources for patent prosecution practitioners covering patent applications, prior art searches, claim drafting, office action responses, and IP portfolio management.
Overview
Patent and intellectual property attorneys occupy a specialized niche in the legal profession, requiring both legal expertise and technical knowledge sufficient to understand and describe inventions across a wide range of technologies. Patent prosecution — the process of obtaining patents from the United States Patent and Trademark Office (USPTO) — demands mastery of the Patent Act (35 U.S.C.), the Manual of Patent Examining Procedure (MPEP), and a constantly evolving body of case law from the Federal Circuit and Supreme Court that defines the boundaries of patentable subject matter, novelty, nonobviousness, and adequate disclosure.
The patent landscape was fundamentally reshaped by the America Invents Act (AIA) of 2011, which transitioned the U.S. from a first-to-invent to a first-inventor-to-file system and created new post-grant review proceedings at the Patent Trial and Appeal Board (PTAB). The Supreme Court's decision in Alice Corp. v. CLS Bank (2014) further transformed patent practice by establishing a two-step framework for evaluating patent eligibility under 35 U.S.C. § 101, which has had profound effects on software, business method, and diagnostic method patents. The KSR v. Teleflex (2007) decision expanded the obviousness analysis under § 103, moving beyond rigid application of the teaching-suggestion-motivation test to a more flexible, common-sense approach.
IP portfolio management has become increasingly strategic as companies recognize the competitive value of patent assets. Practitioners must advise on prosecution strategies that align with business objectives, including continuation practice to maintain application families, international filing strategies through the Patent Cooperation Treaty (PCT) and national-phase entries, freedom-to-operate analyses, and IP due diligence in corporate transactions. The duty of candor and good faith owed to the USPTO (37 CFR § 1.56) imposes unique ethical obligations on patent practitioners, requiring disclosure of all information material to patentability and creating the risk of inequitable conduct findings that can render an entire patent unenforceable.
Key Rules
| Rule | Citation | Summary |
|---|---|---|
| Patentable Subject Matter | 35 U.S.C. § 101; Alice Corp. v. CLS Bank, 573 U.S. 208 (2014) | Defines patent-eligible subject matter as any new and useful process, machine, manufacture, or composition of matter. The Alice/Mayo two-step framework tests whether claims are directed to abstract ideas, laws of nature, or natural phenomena, and if so, whether they contain an 'inventive concept' sufficient to transform the claim into patent-eligible subject matter. |
| Novelty | 35 U.S.C. § 102 (AIA) | A patent may not be obtained if the claimed invention was patented, described in a printed publication, in public use, on sale, or otherwise available to the public before the effective filing date, subject to a one-year grace period for the inventor's own disclosures. |
| Nonobviousness | 35 U.S.C. § 103; KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007) | A patent may not be obtained if the differences between the claimed invention and the prior art are such that the invention would have been obvious to a person having ordinary skill in the art. KSR expanded the analysis beyond the rigid TSM test to include common sense and design choice rationales. |
| Specification and Claims | 35 U.S.C. § 112 | Requires the patent specification to contain a written description of the invention, enable a person skilled in the art to make and use it, and set forth the best mode. Claims must particularly point out and distinctly claim the subject matter of the invention. |
| MPEP Guidelines | Manual of Patent Examining Procedure (MPEP), 10th Ed. | The USPTO's comprehensive guidance document for patent examiners and practitioners, covering examination procedures, patentability standards, appeal processes, and post-grant proceedings. Updated regularly through revisions. |
| Patent Trial and Appeal Board Rules | 37 CFR Part 42 | Governs inter partes review (IPR), post-grant review (PGR), and covered business method review proceedings before the PTAB, including petition requirements, discovery, trial procedures, and estoppel effects. |
Key Resources
United States Patent and Trademark Office
USPTO
The federal agency responsible for granting U.S. patents and registering trademarks, providing examination guidelines, fee schedules, electronic filing systems (EFS-Web/Patent Center), and PTAB proceedings.
Visit resource →Manual of Patent Examining Procedure (MPEP)
USPTO
The authoritative reference for patent examination standards and procedures, covering all aspects of patent prosecution from filing through issuance, including chapters on patentability, disclosure requirements, and appeal procedures.
Visit resource →Google Patents
Free search engine for patents and patent applications worldwide, offering full-text search, classification browsing, prior art finder, and links to patent family members across jurisdictions.
Visit resource →USPTO Patent Full-Text Databases (PatFT/AppFT)
USPTO
Official databases for searching the full text of granted U.S. patents (PatFT) and published patent applications (AppFT), with Boolean search capabilities across all patent fields.
Visit resource →WIPO PCT Resources
World Intellectual Property Organization
Resources for the Patent Cooperation Treaty international filing system, including the PCT Applicant's Guide, fee calculator, sequence listing tools, and PATENTSCOPE global patent database.
Visit resource →Practice Checklists
Patent Application Filing Checklist
- Conduct inventor interview and document invention disclosure
- Perform prior art search and analyze results for novelty and nonobviousness
- Draft specification including detailed description and drawings
- Draft independent and dependent claims with proper antecedent basis
- Assess patent eligibility under Alice/Mayo § 101 framework
- Prepare oath/declaration and application data sheet (ADS)
- File via Patent Center with proper entity status and fees
- Consider provisional filing for establishing early priority date
- Review foreign filing license requirements (35 U.S.C. § 184)
- Calendar all deadlines including 12-month provisional conversion and PCT filing
Prior Art Search Checklist
- Search USPTO PatFT and AppFT databases with keyword combinations
- Search CPC and IPC classification codes relevant to the invention
- Search Google Patents for domestic and international prior art
- Review non-patent literature (academic papers, trade publications)
- Check relevant industry standards and technical specifications
- Search foreign patent databases (EPO Espacenet, WIPO PATENTSCOPE)
- Document search strategy and results for duty of candor compliance
- Analyze closest prior art references for § 102 and § 103 issues
Office Action Response Checklist
- Calendar response deadline (typically 3 months, extendable to 6)
- Analyze each rejection and objection in the office action
- Review cited prior art references thoroughly
- Draft claim amendments addressing rejections while preserving scope
- Prepare arguments distinguishing claims from prior art
- Consider examiner interview before or with response
- Review information disclosure statement (IDS) obligations for new references
- File response via Patent Center with any required fees
IP Due Diligence Checklist
- Inventory all patents, applications, and patent families
- Verify chain of title and assignment records at USPTO
- Review prosecution histories for potential issues (prosecution history estoppel, inequitable conduct)
- Assess patent validity and enforceability
- Conduct freedom-to-operate analysis for key products/technologies
- Review existing license agreements and encumbrances
- Evaluate maintenance fee status and upcoming deadlines
- Assess international portfolio coverage and national-phase deadlines
Ethics Rules
Duty of Candor to USPTO
37 CFR § 1.56; MPEP § 2001–2016
Each individual associated with the filing and prosecution of a patent application has a duty to disclose all information known to be material to patentability. Failure to comply may result in the patent being held unenforceable for inequitable conduct.
Inequitable Conduct Doctrine
Therasense, Inc. v. Becton, Dickinson & Co., 649 F.3d 1276 (Fed. Cir. 2011)
A patent may be rendered unenforceable if the applicant made affirmative misrepresentations or failed to disclose material information with the specific intent to deceive the USPTO. Therasense heightened the standard, requiring but-for materiality and specific intent.
Patent Agent vs. Patent Attorney
35 U.S.C. § 2(b)(2)(D); USPTO OED Rules
Patent agents (non-lawyers registered to practice before the USPTO) may prosecute patent applications but cannot provide legal opinions, litigation advice, or represent clients in court. Patent attorneys are both bar-admitted lawyers and USPTO-registered practitioners.
Privilege in Patent Prosecution
In re Queen's University at Kingston, 820 F.3d 1287 (Fed. Cir. 2016)
Communications between patent practitioners (agents or attorneys) and clients for the purpose of patent prosecution are protected by privilege, but the scope of protection may differ between patent agents and patent attorneys, particularly outside the prosecution context.
Common Motions & Filings
Provisional Patent Application
An initial filing that establishes a priority date for the invention without formal claims or oath, providing 12 months to file a non-provisional application claiming priority. Lower filing fees and no examination.
Non-Provisional Patent Application
The formal patent application requiring specification, claims, drawings, oath/declaration, and fees. Examined by a USPTO patent examiner for compliance with patentability requirements.
Continuation / Continuation-in-Part (CIP)
Continuation applications claim priority to a parent application and pursue additional claims to the same disclosed invention. CIPs add new matter to the specification while maintaining priority for previously disclosed subject matter.
Office Action Response
Written response to a USPTO examiner's rejections and objections, including claim amendments, arguments, declarations, and any additional prior art disclosures required under the duty of candor.
Request for Continued Examination (RCE)
Filed after final rejection to continue prosecution with the same examiner by submitting a new amendment or argument, resetting the examination process. Requires additional fees.
Inter Partes Review (IPR) Petition
A post-grant proceeding filed before the PTAB challenging the validity of an issued patent on grounds of novelty or nonobviousness based on prior art patents and printed publications. Must demonstrate reasonable likelihood of prevailing on at least one challenged claim.
Frequently Asked Questions
What is the difference between a provisional and non-provisional patent application?
A provisional patent application is a lower-cost initial filing that establishes a priority date without requiring formal patent claims, an oath or declaration, or an information disclosure statement. It is not examined by the USPTO and automatically expires after 12 months if not converted. Its primary purpose is to secure the earliest possible filing date while giving the applicant time to develop the invention, assess commercial viability, and prepare a complete application. A non-provisional application is the formal patent application that is examined by the USPTO, requiring a complete specification, at least one claim, drawings (if necessary), an oath/declaration, and the required fees. It must be filed within 12 months of the provisional to claim priority to the provisional's filing date. Note that the provisional must adequately support the claims in the subsequent non-provisional under § 112 to establish priority.
How long does it take to get a patent?
The average time from filing a non-provisional application to final disposition (allowance or abandonment) is approximately 23–26 months, though this varies significantly by technology area. Some art units have pendency times exceeding 3 years, while others may issue patents in under 18 months. The USPTO offers several mechanisms to accelerate examination: Track One prioritized examination (guarantees final disposition within 12 months for an additional fee), the Patent Prosecution Highway (PPH) for applications with allowed claims in a participating foreign office, and petition to make special based on applicant age, health, or environmental quality/energy conservation inventions. After allowance, the patent issues approximately 4–8 weeks after payment of the issue fee.
What is patentable subject matter after Alice Corp. v. CLS Bank?
After Alice, patentable subject matter under 35 U.S.C. § 101 is assessed using a two-step framework. Step 1: determine whether the claims are 'directed to' a judicial exception — an abstract idea, law of nature, or natural phenomenon. If yes, proceed to Step 2: determine whether the claim elements, individually and as an ordered combination, contain an 'inventive concept' that transforms the claim into something 'significantly more' than the judicial exception. This framework has been particularly impactful for software and business method patents, where claims directed to fundamental economic practices, mathematical concepts, or certain methods of organizing human activity may be found patent-ineligible unless they recite specific technical improvements. The USPTO has issued detailed guidance (2019 Revised Patent Subject Matter Eligibility Guidance) with examples across technology areas to help examiners and practitioners apply the framework consistently.
Recent Developments
Recent patent law developments include ongoing legislative efforts to reform Section 101 patent eligibility standards, evolving USPTO guidance on AI-assisted inventions and inventorship requirements (Thaler v. Vidal confirmed that AI cannot be named as an inventor), continued high volume of inter partes review petitions at the PTAB with evolving discretionary denial standards, updated USPTO terminal disclaimer practice rules, and increasing attention to standard-essential patents (SEPs) and FRAND licensing obligations. The intersection of AI and patent law continues to generate novel questions about patentability, inventorship, and prior art.