Prosecution Insights
Last updated: October 02, 2026
Application No. 18/537,204

RNA BIOMARKERS FOR HEREDITARY ANGIOEDEMA

Final Rejection §112
Filed
Dec 12, 2023
Priority
Sep 16, 2016 — provisional 62/395,811 +2 more
Examiner
SITTON, JEHANNE SOUAYA
Art Unit
1682
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Takeda Pharmaceutical Company Limited
OA Round
4 (Final)
53%
Grant Probability
Moderate
5-6
OA Rounds
9m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 53% of resolved cases
53%
Career Allowance Rate
361 granted / 679 resolved
-6.8% vs TC avg
Strong +48% interview lift
Without
With
+48.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
49 currently pending
Career history
736
Total Applications
across all art units

Statute-Specific Performance

§101
25.8%
-14.2% vs TC avg
§103
22.8%
-17.2% vs TC avg
§102
13.2%
-26.8% vs TC avg
§112
30.4%
-9.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 679 resolved cases

Office Action

§112
DETAILED ACTION 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 . Status of Claims Currently, claims 1-3, 5, 8-10, 13, 15, 22-23, and 29-37 are pending in the instant application. All the amendments and arguments have been thoroughly reviewed but are deemed insufficient to place this application in condition for allowance. The following rejections are reiterated. They constitute the complete set being presently applied to the instant Application. Response to Applicant's arguments follow. This action is FINAL. The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. The rejection under 35 USC 103, made in the previous office action, is withdrawn. The arguments that Lopez-Lera does not teach identifying the subject based on the level of the RNA biomarker set which includes MT-ND3 is persuasive. Claim Rejections - 35 USC § 112 Claims 1-3, 5, 8-10, 13, 15, 22-23, and 29-37 are rejected under 35 U.S.C. 112(a) because the specification, while being enabling for a method of measuring the level of MT-ND3 mRNA in a human patient, detecting increased expression of MT-ND3 or MT-ND3 and MT-CO3 as compared to the level of MT-ND3 or MT-ND3 and MT-CO3 in healthy individuals, and diagnosing the patient as having hereditary angioedema, does not reasonably provide enablement for the claims as broadly written. The specification does not enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make or use the invention commensurate in scope with these claims. There are many factors to be considered when determining whether there is sufficient evidence to support determination that a disclosure does not satisfy the enablement requirements and whether any necessary experimentation is undue. These factors have been described by the court in In re Wands, 8 USPQ2d 1400 (CA FC 1988). Wands states at page 1404, “Factors to be considered in determining whether a disclosure would require undue experimentation have been summarized by the board in Ex parte Forman. They include (1) the quantity of experimentation necessary, (2) the amount of direction or guidance presented, (3) the presence or absence of working examples, (4) the nature of the invention, (5) the state of the prior art, (6) the relative skill of those in the art, (7) the predictability or unpredictability of the art, and (8) the breadth of the claims.” The nature of the invention and the breadth of the claims: The claims are broadly drawn to methods of measuring the expression level of MT-ND3 mRNA in any subject and making diagnostic and treatment decisions based on the level of the mRNA for HAE and HAE attack, where the undefined level of the mRNA is compared to any undefined control subject. The invention is in a class of inventions which the CAFC has characterized as 'the unpredictable arts such as chemistry and biology" (Mycolgen Plant Sci., Inc. v. Monsanto Co., 243 F.3d 1316, 1330 (Federal Circuit 2001)). The amount of direction/guidance and Presence/absence of working examples: The specification defines subject as a human or a non-human mammal (instant specification p. 9). The specification teaches, at page 40, a study to investigate novel RNA biomarkers of hereditary angioedema, wherein an analysis was performed comparing the circulating small RNAs present in plasma samples obtained from 39 patients with HAE to samples obtained from 3 healthy individuals. The specification teaches the abundance of each of the detected RNAs were compared between the samples from healthy individuals and patients having HAE. The specification teaches as shown in Figure 1, RNA transcripts of MT-ND3 and MT-CO3 were higher in samples from human patients having HAE as compared to samples form healthy individuals in the initial RNASeq as well as by RT-qPCR analysis. However, the lone example in the specification, Example 1, and the accompanying Figure 1, are limited to hereditary angioedema (HAE) in human subjects compared to healthy individuals. The specification does not teach analysis of MT-ND3 expression in non-human subjects. The state of the prior art and the predictability or unpredictability of the art: The art teaches that expression levels of can be inconsistently and unpredictably associated with various diseases. Regarding miRNA expression, Ha teaches that conserved miRNAs does not necessarily exhibit the same expression levels or patterns in different species (Ha et al. Biochim Biophys Acta 2008 Nov 1779(11): 735-742, Abstract). Although sequence conservation of miRNAs and target genes may suggest conservation of expression patterns and functions, this assumption does not hold true for many conserved miRNAs (Ha p. 4). Moreover, developmental variation may exist among different species (Ha p. 5). Although the regulatory mechanisms for miRNAs and their target recognition are highly conserved between species, expression variation of miRNAs and their targets exists among different species and even closely related species (Ha p. 5). The level of skill in the art: The level of skill in the art is deemed to be high. The quantity of experimentation necessary: The quantity of experimentation in this area is large since there are a large number of parameters which would have to be studied to enable the skilled artisan to use the method as broadly claimed. The claims are directed to a correlation between HAE diagnosis or risk of attack in any subject, based on undefined levels of MT-ND3 RNA levels to undefined controls. It is unpredictable that a skilled artisan could identify any disease other than hereditary angioedema based on the expression levels of MT-ND3 in a human subject. While the specification provides guidance for a correlation between the expression level of MT-ND3 and HAE in humans, it does not provide guidance for the broad scope of the claims. To practice the invention as broadly as it is claimed, the skilled artisan would have to perform additional unpredictable and undue experimentation of expression levels of MT-ND3 in any subjects as broadly defined, which would require a large amount of inventive effort with no predictable expectations of success. Thus given the broad claims in an art whose nature is identified as unpredictable, the large quantity of research required to define these unpredictable variables, the lack of guidance provided in the specification, the absence of a working example and the negative teachings in the prior art balanced only against the high level of skill in the art, it is the position of the examiner that it would require undue experimentation for one of ordinary skill in the art to perform the method of the claims as broadly written. Response to Arguments The response traverses the rejection and asserts that the claims have been amended to recite “an increase in the level of MT-ND3 of the subject from that of a healthy subject…”. The response then asserts that the office action acknowledges the specification is enabled for “a method of measuring MT-ND3 mRNA in a human patient…”. These arguments have been thoroughly reviewed but were not found persuasive because the claims are still broadly drawn to the method in any subject. Accordingly, the rejection is maintained. Conclusion No claims are allowed. THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to examiner Jehanne Sitton whose telephone number is (571) 272-0752. The examiner is a hoteling examiner and can normally be reached Mondays-Fridays from 8:00 AM to 2:00 PM Eastern Time Zone. 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, Winston Shen, can be reached on (571) 272-3157. The fax phone number for 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. /JEHANNE S SITTON/Primary Examiner, Art Unit 1682
Read full office action

Prosecution Timeline

Show 1 earlier event
Apr 24, 2025
Non-Final Rejection mailed — §112
Jul 24, 2025
Response Filed
Oct 31, 2025
Final Rejection mailed — §112
Feb 02, 2026
Request for Continued Examination
Feb 04, 2026
Response after Non-Final Action
Apr 01, 2026
Non-Final Rejection mailed — §112
Jul 01, 2026
Response Filed
Sep 04, 2026
Final Rejection mailed — §112 (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

5-6
Expected OA Rounds
53%
Grant Probability
99%
With Interview (+48.0%)
3y 7m (~9m remaining)
Median Time to Grant
High
PTA Risk
Based on 679 resolved cases by this examiner. Grant probability derived from career allowance rate.

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