Chapter 1900
Chapter 1900 covers third-party protests against pending patent applications. Protest must be filed before mailing of NOA or publication — whichever is earlier. After publication, applicant consent or USPTO discretionary approval is needed. Protestor has no further participation rights after submission.
Core Concepts
Protest Basics — 37 CFR 1.291 / MPEP 1901 Any member of public may protest pending application before it publishes or before NOA, whichever is earlier. Protest must include: (1) prior art or other information, (2) concise explanation of relevance, (3) copy of each document. No fee required.
Timing — MPEP 1901.02 Before publication or NOA: protest accepted and entered into record. After publication but before NOA: requires applicant consent OR USPTO discretionary approval — not routinely granted. After NOA: not accepted. Protestor has NO further participation rights after submission — no right to respond, comment, or appeal.
Content of Protest — MPEP 1901.03 Prior art (patents, publications), public use evidence, on-sale bar evidence. Explanation of how each item is relevant to claims. Must be specific — general objections not accepted. Each document must be submitted in copy.
Effect of Protest — MPEP 1901.06 Examiner must consider protest items. No obligation to issue rejection based on protest. Protestor has no right to interview examiner. Protest becomes part of application file history.
Key Rules
EXAM TIP
The deadline rule is the key test point: before whichever is earlier — NOA or publication. After publication requires consent or discretionary USPTO approval (not routinely granted). After NOA is too late entirely. Also remember: protestor submits and disappears — no participation rights, no right to interview, no appeal rights.
Common Traps
Search Terms
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