MPEP 800 Practice Questions (Restriction / Double Patenting)
Master independent and distinct inventions, election with or without traverse, petition vs. appeal of restriction requirements, 35 U.S.C. 121 safe harbor, and terminal disclaimers.
AI Practice✓ Based on MPEP Ninth Edition, Rev. 01.2024 (Nov 2024)
According to USPTO practice as described in MPEP Form Paragraph 8.20.03, product and process inventions are considered unrelated if it can be shown that:
According to MPEP Form Paragraph 8.20.03 (Unrelated Product and Process Inventions), product and process inventions are considered unrelated if it can be shown that the product cannot be used in, or made by, the process.
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In resolving an issue of double patenting between an application under examination and a reference application or patent, under what condition is only a one-way determination of distinctness required?
According to the provided MPEP text, under the One-Way Test for Distinctness, if the filing date of an application under examination is the same as or later than that of a reference application or patent, only a one-way determination of distinctness is needed in resolving the issue of double patenting.
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According to 37 CFR 1.129(c), the transitional provisions set forth in 37 CFR 1.129(a) and (b) are NOT applicable to which of the following patent applications?
37 CFR 1.129(c) specifically clarifies that the transitional provisions of 37 CFR 1.129(a) and (b) are not applicable to any application filed after June 8, 1995.
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According to the MPEP, in determining whether a statutory basis for a double patenting rejection under 35 U.S.C. 101 exists, what does the term "same invention" mean?
The MPEP text explicitly states that 35 U.S.C. 101 prevents two patents from issuing on the same invention, and "'Same invention' means identical subject matter."
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According to the MPEP text, 'A rejection based on an improper Markush grouping should be made in an Office action on the merits.' Furthermore, in certain circumstances, both a provisional election of species requirement and an improper Markush grouping rejection may apply to the same claim.
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According to MPEP instructions regarding restriction requirements and claim rejoinder, which form paragraphs must be used if all of the claims are in proper form (i.e., they include all the limitations of an allowable claim)?
According to the provided MPEP text, instruction 9 explicitly states: 'If all of the claims are in proper form, i.e., they include all the limitations of an allowable claim, one of form paragraphs 8.45, 8.46 or 8.47 must be used.'
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According to the MPEP text, a provisional nonstatutory double patenting rejection is made when the patentably indistinct claims are in another copending application (i.e., they have not in fact been patented). If the claims are already in an issued patent, a provisional rejection is not used. Additionally, the claims do not need to be identical to be rejected for nonstatutory double patenting, and the introductory form paragraph must be used only ONCE in an Office action.
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According to the MPEP, if claims in a pending patent application are directed to subject matter that is not patentably distinct from an invention claimed in a co-pending reference application that has not yet issued as a patent, how should the examiner reject the claims?
According to the MPEP text, any claims in the instant application directed to subject matter that is not patentably distinct from an invention claimed in a reference should be rejected (or provisionally rejected if the reference has not yet issued as a patent) on the grounds of nonstatutory double patenting.
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How MPEP 800 Restriction & ODP Is Tested on the 2026 Patent Bar Exam
MPEP Chapter 800 (Restriction in Applications; Double Patenting) tests two intertwined doctrines: restriction requirements (MPEP §§ 802–823) and statutory vs. nonstatutory (obviousness-type) double patenting (MPEP § 804). For a proper restriction requirement in a 111(a) application, the examiner must establish both (1) that the inventions are independent or distinct as claimed, and (2) that there would be a serious search or examination burden if restriction were not required.
Know the procedural remedy: an applicant must always make an election in reply to a restriction requirement (even if traversing); to preserve the right to petition the Technology Center Director under 37 CFR 1.144, the election must be made WITH traverse. Restriction requirements are reviewable by petition (37 CFR 1.144), NOT by appeal to the PTAB.
For double patenting (MPEP § 804), statutory (35 U.S.C. 101 "same invention") double patenting can NEVER be overcome by a terminal disclaimer, whereas nonstatutory (obviousness-type) double patenting can be overcome by filing a terminal disclaimer under 37 CFR 1.321(c) or (d) that includes a common-ownership enforcement provision.
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Can statutory double patenting under 35 U.S.C. 101 be overcome with a terminal disclaimer?
No. Under MPEP § 804.02, a terminal disclaimer under 37 CFR 1.321 is only effective to overcome nonstatutory (obviousness-type) double patenting—never statutory (same-invention) double patenting under 35 U.S.C. 101.
How is a restriction requirement reviewed if the examiner makes it final?
Restriction requirements are petitionable to the Director under 37 CFR 1.144 (after the examiner makes the restriction requirement final and only if the applicant originally elected with traverse), not appealable to the Patent Trial and Appeal Board.
What is required for 35 U.S.C. 121 safe harbor protection against double patenting?
Under MPEP § 804.01, 35 U.S.C. 121 protects a divisional application from a nonstatutory double patenting rejection over the parent or another divisional only if: (1) the PTO issued a formal restriction requirement earlier, (2) the later application is filed as a divisional (not a continuation or CIP), and (3) "consonance" is maintained with the line of demarcation set in the restriction requirement.