Patent Application Types

The USPTO accepts several distinct types of patent applications, each with different purposes: PROVISIONAL APPLICATION: a 12-month placeholder that establishes a priority date without beginning examination; does NOT mature into a patent unless followed by a regular nonprovisional; low cost ($350 small entity, $175 micro entity); provides 'patent pending' status; UTILITY APPLICATION (NONPROVISIONAL): the standard examination path; examined for novelty, obviousness, written description, enablement, and eligibility; claims determine the scope of protection; typical government fees: $1,760 small entity ($880 micro entity) filing + search + examination; DESIGN PATENT APPLICATION: covers the ornamental features of a manufactured article; different claim format (single claim drawing-based); shorter term: 15 years from grant (post-December 18, 2013); no maintenance fees; PLANT PATENT APPLICATION: covers asexually reproduced distinct and new varieties of plants; single claim; 20-year term from filing date; CONTINUATION APPLICATION: new application filed while parent is pending; same disclosure as parent — no new matter; new set of claims; claims priority to parent's filing date for all claim elements disclosed in the parent; DIVISIONAL APPLICATION: filed to pursue claims that were divided out of the parent by a restriction requirement; claims must be to an invention that was restricted/elected in the parent; claims priority to parent; CONTINUATION-IN-PART (CIP): new application that adds new matter not in the parent; claims get parent's priority date for subject matter that was in the parent; new matter gets the CIP's filing date as priority; complex priority analysis required; PCT APPLICATION (PATENT COOPERATION TREATY): international filing route; provides up to 30 months from priority date before entering national/regional phases; effective way to defer costs in multiple countries.

A provisional patent application is a strategic tool — but only if used correctly: WHAT A PROVISIONAL DOES: establishes a priority date immediately; provides up to 12 months to file a nonprovisional (35 U.S.C. § 111(b)); creates 'patent pending' status; delays the start of examination (and cost); allows time to assess commercial viability; CRITICAL REQUIREMENTS: must be followed by a nonprovisional within 12 months — if not, the provisional is abandoned and the priority date is LOST; the nonprovisional must claim priority to the provisional by filing a proper claim and cross-reference; provisional does NOT get examined; cannot claim priority to a provisional for subject matter not in the provisional; COMMON MISTAKES: filing a thin provisional (summary-level description) that doesn't fully support later claims; later-filed claims not supported by provisional → get the later filing date, not the provisional's date; not filing the nonprovisional within 12 months; WHEN TO FILE A PROVISIONAL: early stage invention not yet fully reduced to practice; need to establish a date before a public disclosure (conference, publication, product launch); want to observe market reaction before investing in full prosecution; filing before PCT to maximize the PCT 30-month window; BEST PRACTICE: the provisional should be as detailed as the final application; include all embodiments, variations, and technical details you want to cover; include claim-level descriptions even though no claims are required; better to spend $3,000-$10,000 on a thorough provisional than $500 on a thin one that later fails to support your claims; PROVISIONAL FARM: some companies file many provisionals and then combine into a single nonprovisional — allowed as long as each provisional and its supporting subject matter is properly identified.

A continuation application is one of the most powerful tools in patent portfolio strategy: LEGAL BASIS: 35 U.S.C. § 120: claims the benefit of an earlier filed copending application; must be filed while the parent application is still pending (before issue fee is paid or before the parent abandons); discloses the same invention as the parent (no new matter); gets the parent's filing date for all claimed subject matter; WHAT A CONTINUATION ALLOWS: file different claims based on the same specification; claims can be: broader (seeking coverage the examiner rejected in the parent); narrower (targeting specific commercial embodiments); in different format (device vs. method); focused on competitors' specific products; CONTINUATION STRATEGY — KEY USES: (a) COMPETITOR TRACKING: after the parent issues, observe a competitor's product; file a continuation with claims specifically designed to cover the competitor's product (using existing disclosure); (b) BROADENING: examiner rejected broad claims; file continuation with different claim language that might achieve broader coverage; (c) DIVISIONAL CLAIMS: if the examiner issued a restriction, pursue the restricted group in a divisional; (d) CLAIM HEDGING: file continuation with narrower fallback claims as insurance if parent claims are later challenged; COPENDING REQUIREMENT: the continuation must be filed while the parent is pending; after the parent issues, a continuation is no longer possible (only CIP); file the continuation BEFORE paying the issue fee; PROSECUTION HISTORY: the continuation gets its own prosecution history but can adopt parent's claim construction; parent's prosecution history can affect continuation claim construction; CONTINUATION FAMILY DURATION: a family of continuation applications can extend prosecution over many years; each continuation extends the application-pending status; CONTINUATION EXPLOITATION: patent owners can keep a continuation pending for decades with new claims targeting new products.

Divisional and continuation applications both claim priority to a parent, but for different reasons: DIVISIONAL APPLICATION: ORIGIN: arises from a restriction requirement issued by the examiner; the examiner finds multiple distinct inventions in a single application and requires the applicant to choose one for examination; the restricted inventions are pursued in divisional applications; LEGAL ENTITLEMENT: 35 U.S.C. § 121 safe harbor: if the examiner issues a restriction requirement, the applicant has a right to file divisionals without being barred by double patenting; the § 121 safe harbor protects divisionals from obviousness-type double patenting IF the claims remain within the group as restricted; DIVISIONAL FILING: can be filed at any time while the parent is pending; claims must be directed to the restricted invention (not new matter); gets the parent's filing date; CONTINUATION APPLICATION: ORIGIN: applicant's choice — no restriction required; same disclosure as parent; different claims; PURPOSE: pursue alternative claim language; broaden claims; target competitors; TIMING: must be filed while parent is copending; KEY DIFFERENCES: divisional = triggered by restriction requirement; continuation = applicant's choice; divisional = § 121 safe harbor from ODP; continuation = subject to ODP (need terminal disclaimer if obvious variant); CONTINUATION-IN-PART vs. BOTH: CIP adds new subject matter; new matter gets CIP's filing date; old matter gets parent's date; complex priority analysis; STRATEGY INTEGRATION: a patent family can include parent + multiple divisionals (from restriction) + multiple continuations (claim variations) + CIPs (technical improvements with new dates); each branch adds enforcement options and claim scope alternatives.

A continuation-in-part (CIP) is a complex application type with significant priority date risks: WHAT A CIP ADDS: a CIP can add new matter beyond what was in the parent application; unlike a regular continuation (which can only claim what was in the parent), a CIP can include new experimental data, new embodiments, or improvements made after the parent was filed; PRIORITY DATE SPLITTING: each claim in a CIP gets different priority dates: claims that are fully supported by the parent's disclosure → parent's priority date; claims that require subject matter only in the CIP (the new matter) → CIP's filing date; THE PRIORITY DATE ANALYSIS: for each claim, the question is: is this claim fully supported by the parent specification? If yes → parent's date; if no (claim requires CIP-only matter) → CIP's date; intervening prior art: any prior art published or filed between the parent's date and the CIP's date becomes potentially prior art to the new-matter claims; this is a significant risk; WHEN TO FILE A CIP: when new experimental data significantly improves the claimed scope; when a follow-on invention builds on the parent and the applicant wants a single prosecution family; when PCT or EPO practice requires adding new matter as a new application; CIP vs. NEW APPLICATION: a fresh new application (claiming priority to the parent as a continuation) is often better strategy than a CIP; RISKS OF CIP: complex priority analysis; new matter claims subject to more prior art; common specification with different effective dates makes claim scope analysis difficult in litigation; failure to properly connect claims to parent disclosure can result in losing the earlier priority date; BEST PRACTICE: use CIPs sparingly; for technical improvements, consider filing a new application that claims priority to the parent for the improvements that ARE in the parent, and filing separate applications for truly new subject matter.