Prosecution Insights
Last updated: July 17, 2026
Application No. 18/024,140

MODIFIED CORONAVIRUS STRUCTURAL PROTEIN

Non-Final OA §103§112§DP
Filed
Mar 01, 2023
Priority
Sep 01, 2020 — provisional 63/073,327 +2 more
Examiner
HILL, MYRON G
Art Unit
1671
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Medicago Inc.
OA Round
1 (Non-Final)
66%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
86%
With Interview

Examiner Intelligence

Grants 66% — above average
66%
Career Allowance Rate
461 granted / 693 resolved
+6.5% vs TC avg
Strong +20% interview lift
Without
With
+19.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
32 currently pending
Career history
729
Total Applications
across all art units

Statute-Specific Performance

§101
2.5%
-37.5% vs TC avg
§103
41.4%
+1.4% vs TC avg
§102
4.0%
-36.0% vs TC avg
§112
16.9%
-23.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 693 resolved cases

Office Action

§103 §112 §DP
Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Election/Restrictions Applicant's election with traverse of SEQ ID# 18 in the reply filed on 6/8/26 is acknowledged. The traversal is on the ground(s) that the unity breaking art does not teach what stated by the examiner. This is not found persuasive because claim 1 recites the CT and TM are derived from a portion. Here the prior art looks like the derived portion. Additionally, applicant argues unexpected results for the combination. Unexpected results can be used for an obviousness rejection for example but not against unity of invention. The requirement is still deemed proper and is therefore made FINAL. Claim 33 is withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected species. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-12, 21, 26, 33-34, 36, 39, 41, 46, 48-49 and 57-58 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claims 1-12, 21, 26, 34, 36, 39, 41, 46, 48-49 and 57-58 contain the term “derived” and it is not clear how much can be changed and still be ectodomain, CT, and TM and the term is not defined in the specification. The percent identity claims are included because they do not cure the derivative issue because they still allow for variation in the portions and chimera TM and CT. Claims 5 and 8 contain the term “conservative substitutions” is not clear as to specifically what is included. Paragraph 312 if the PGPub gives a non-limiting definition. It says residues of the same class but then gives examples of the classes. The classes are not limited to those and thus the metes and bounds are not clear. The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 1-12, 21, 26, 33-34, 36, 39, 41, 46, 48-49 and 57-58 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. The guidelines for the Examination of Patent Applications Under the 35 U.S.C. 112, § 1 "Written Description" Requirement make clear that if a claimed genus does not show actual reduction to practice for a representative number of species, then the Requirement may be alternatively met by reduction to drawings, or by disclosure of relevant, identifying characteristics, i.e., structure or other physical and or chemical properties, by functional characteristics coupled with a known or disclosed correlation between function and structure, or by a combination of such identifying characteristics, sufficient to show the Applicant was in possession of the genus (Federal Register, Vol. 66, No. 4, pages 1099-1111, Fri. January 5, 2001, see especially page 1106 column 3). The specification does not provide adequate written description of the claimed invention. The legal standard for sufficiency of a patent's (or a specification's) written description is whether that description "reasonably conveys to the artisan that the inventor had possession at that time of the. . .claimed subject matter", Vas-Cath, Inc. V. Mahurkar, 19 USPQ2d 1111 (Fed. Cir. 1991). In the instant case, the specification does not convey to the artisan that the Applicant had possession at the time of invention of the claimed invention, the genus of portions of CT and TM and the chimeric CT and TM that function as CT and TM. The genus of portions included is as little as one residue of the sequence or the chimera can be one coronavirus residue and one influenza residue. The specification only teaches specific combinations of chimeric CTTM and chimeric TM and chimeric CT, for example see Figure 3a. The Federal Circuit addressed the application of the written description requirement to DNA-related inventions in University of California v. Eli Lilly and Co., 119 F.3d 1559, 43 USPQ2d 1398 (Fed. Cir. 1997). The court stated that “[a] written description of an invention involving a chemical genus, like a description of a chemical species, requires a precise definition, such as by structure, formula, [or] chemical name, of the claimed subject matter sufficient to distinguish it from other materials.” Id. At 1567, 43 USPQ2d at 1405. The court concluded that “naming a type of material generally known to exist, in the absence of knowledge as to what that material consists of, is not a description of that material.” Id. The Federal Circuit clarified that a molecule can be adequately described without disclosing its complete structure. See Enzo Biochem, Inc. V. Gen-Probe Inc., 296 F.3d 1316, 63 USPQ2d 1609 (Fed. Cir. 2002). The Enzo court adopted the standard that the written description requirement can be met by “show[ing] that an invention is complete by disclosure of sufficiently detailed, relevant identifying characteristics ....i.e., complete or partial structure, other physical and/or chemical properties, functional characteristics when coupled with a known or disclosed correlation between function and structure, or some combination of such characteristics. “ Id. At 1324, 63 USPQ2d at 1613 (emphasis omitted, bracketed material in original). Furthermore The Board in Ex Parte Kubin found that the written description of 35 USC 112 was not met, stating that Without a correlation between structure and function, the claim does little more than define the claimed invention by function. That is not sufficient to satisfy the written description requirement. See Eli Lilly, 119 F.3d at 1568, 43 USPQ2d at 1406 (“definition by function … does not suffice to define the genus because it is only an indication of what the gene does, rather than what it is”). The Board in Ex Parte Kubin further stated on page 16 that Possession may not be shown by merely describing how to obtain possession of members of the claimed genus or how to identify their common structural features. See University of Rochester, 358 F.3d at 927, 69 USPQ2d at 1895. The court in In re Alonso (Fed. Cir. 2008) citing In re Enzo, Enzo, 323 F.3d at 969 stated that [F]or purposes of satisfying the written description requirement, it is not enough merely to disclose a method of making and identifying compounds capable of being used to practice the claimed invention. In this case, the specification does not appear to describe the full range of chimeras and portions of CT and TM and thus does not satisfy either the Lilly nor Enzo standards. The Board in Kubin indicated that possession may not be shown by merely describing how to obtain possession of members of the claimed genus. However, the specification does not disclose sufficient information on the structural function relationship to identify the claimed genus of chimeras and portions of CT and TM. One of ordinary skill in the art would not be able to identify the broad claimed genus. Thus, the specification does not provide an adequate written description of the genus of chimeras and portions of CT and TM that is required to practice the claimed invention. The percent identity claims are included because they do not cure the derivative issue and still allow for variation in the portions and chimera TM and CT. Applicants have not described the genus of chimeras and portions of CT and TM sufficiently to show they had possession of the claimed genus. Since the disclosure fails to provide sufficient relevant identifying characteristics, and because the genus is highly variant, one of skill in the art would reasonably conclude that the disclosure fails to provide a representative number of species to describe the genus as broadly claimed. The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claims 5 and 8 are rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. “conservative substitutions” are out of the scope of influenza HA TM (residues that are not in influenza HA TM). Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim(s) 1, 36, 39, 41, 46, 48, and 49 is/are rejected under 35 U.S.C. 103 as being unpatentable over Smith et al. (WO2012088428A1) in view of Unni et al. (J Biosci. 2020;45(1):130. doi: 10.1007/s12038-020-00102-w. PMID: 33184246; PMCID: PMC7561504). For claim 1, Smith et al. teach “the transmembrane domain and/or cytoplasmic tail of a modified influenza HA protein fused to a protein from an infective agent. … Infectious agents can be viruses, bacteria, fungi and/or parasites. Non-limiting examples of viruses from which said infectious agent proteins can be derived from are the following: coronavirus (e.g. the agent that causes SARS)”. (para 66). Thus, Smith et al. teach a coronavirus ectodomain and TM fussed to an influenza CT. For claims 36, 39, and 41, Smith et al. teach VLPs, vaccines, and that the composition can be administered to induce immunity (para 6). For claim 46, the protein can be in a host cell (para 71). For claim 48-49, the nucleic acid is introduced into cells, expressed, and the cells and supernatant were harvested (para 129). Smith et al. is silent on the specific protein from coronavirus. Unni et al. teach the S-protein is exposed to the surface and is essential for entry into the host, the S-protein can be considered as a first-line therapeutic target for antiviral therapy and vaccine development (abstract). One of ordinary skill in the art before the effective filing date would have been motivated to make VLP with SARS-CoV-2 spike as it was the essential for entry and had the expectation of success knowing the VLP of Smith et al. can be used for coronavirus. Thus, it would have been prima facie obvious before the effective date of filing to modify the VLP of Smith et al. with the coronavirus of Unni et al. with the expectation of success. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 1-4, 7, 10-11, and 26 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1 and 6 of copending Application No. 18862407 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because the modified coronavirus ectodomain with chimeric TMCT of the reference application all have SEQ 18 of the present application and thus make obvious the more generalized coronavirus ectodomain with chimeric TMCT. SEQ ID#s 8, 12, 16, 39, 41, 51, 55, and 57 of reference claim 6 comprise SEQ ID# 18. Dependent claims 4, 7, 9-11, and 26 all recited SEQ ID# 18 or a portion thereof. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Allowable Subject Matter Claim 59 is allowed. SEQ ID# 21 and residues 25-1259 of SEQ ID# 51 are free of the prior art. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MYRON G HILL whose telephone number is (571)272-0901. The examiner can normally be reached Mon, Tues, Thurs, Fri.. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Michael Allen can be reached at 571-270-3497. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. MYRON G. HILL Examiner Art Unit 1671 /M.G.H/Examiner, Art Unit 1671 /Shanon A. Foley/Primary Examiner, Art Unit 1671
Read full office action

Prosecution Timeline

Mar 01, 2023
Application Filed
Jul 01, 2026
Non-Final Rejection mailed — §103, §112, §DP (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
66%
Grant Probability
86%
With Interview (+19.8%)
3y 2m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 693 resolved cases by this examiner. Grant probability derived from career allowance rate.

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