Prosecution Insights
Last updated: October 04, 2026
Application No. 18/354,556

METHOD FOR EVALUATION OF FEATURE FLAGS

Non-Final OA §101
Filed
Jul 18, 2023
Examiner
UNG, LANNY N
Art Unit
2197
Tech Center
2100 — Computer Architecture & Software
Assignee
Devrev Inc.
OA Round
5 (Non-Final)
71%
Grant Probability
Favorable
5-6
OA Rounds
1m
Est. Remaining
97%
With Interview

Examiner Intelligence

Grants 71% — above average
71%
Career Allowance Rate
365 granted / 512 resolved
+16.3% vs TC avg
Strong +26% interview lift
Without
With
+25.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
19 currently pending
Career history
534
Total Applications
across all art units

Statute-Specific Performance

§101
18.7%
-21.3% vs TC avg
§103
50.7%
+10.7% vs TC avg
§102
18.4%
-21.6% vs TC avg
§112
7.8%
-32.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 512 resolved cases

Office Action

§101
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 . This Office Action is in response to Request for Continued Examination filed on July 23, 2026. Claims 1-19 are pending. Claims 1, 4, 9, 15-19 have been amended. Response to Amendment Claim Rejections - 35 USC § 101 35 U.S.C. 101 reads as follows: Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title. Claims 9-15 are rejected under 35 U.S.C. 101 because the claimed invention is directed to non-statutory subject matter. The claim(s) does/do not fall within at least one of the four categories of patent eligible subject matter. Claim 9-15 are directed to a system. However, the recited components of the system are software, which is none of a “process, machine, manufacture, or composition of matter” and thus non-statutory under § 101. Claim 9 states that the system comprises “a software” and “a repository”. The “repository” does not appear to be tied to or encompass any hardware. Therefore, these claim limitations are construed as a computer program per se. The claims are directed to functional descriptive material per se, and hence non-statutory. Claims 10-15 depend on the rejected claim 9 and do not resolve the deficiencies and thus, are rejected for at least the same reasons. Allowable Subject Matter Claims 1-8 and 16-19 allowed. The following is an examiner’s statement of reasons for allowance: The closest prior art of record, Munoz teaches a method that comprises executing an application defining a feature flag, the execution of the application being associated with a user identifier. The method further comprises determining if version data associated with the feature flag and user identifier is stored in a local data store. In response determining that the version data associated with the feature flag and user identifier is stored in the local data store an evaluation request is generated that includes the version data and the user identifier. The evaluation request is then communicated to a feature flag evaluation service. Zhang teaches an access control system. The access control system comprises a client application operable to provide a user interface for allowing a user to dynamically configure rules and associated parameters for controlling access to an entity; a rules engine proxy operable to receive said rules and associated parameters from the client application, the rules engine proxy further operable to dynamically compile and execute said rules; and a controller coupled to the rules engine proxy operable to receive input and further operable to trigger the rules engine proxy to execute one or more of said rules in response to the received input. De Schrijver teaches a distributed object storage system that includes several performance optimizations with respect to efficiently storing data objects when coping with a desired concurrent failure tolerance of concurrent failures of storage elements which is greater than two and with respect to optimizing encoding/decoding overhead and the number of input and output operations at the level of the storage elements. Neither Munoz, Zhang nor De Schrijver, anticipate or render obvious the combination set forth in independent claims 1 and 16 recited as “wherein the set of rules are locally stored at the client system, and evaluation using the latest version of the set of rules occurs at the client system with the response data cached at the client system to avoid subsequent communications with the feature flag service, wherein the evaluation using the latest version of the set of rules will either enable or disable the feature of the software, and wherein the set of rules distinguishes between static inputs and dynamic inputs such that static inputs are at least partially evaluated and cached at a policy update time rather than evaluated at runtime” and “wherein the feature flag corresponds to a conditional feature flag that enables the feature flag for a first user while being disabled for a second user, such that the first user is provided with a first version of the software having the feature enabled while the second user is provided with a second version of the software having the feature disabled, and the conditional feature flag is used for progressive rollouts of the software where enabling the feature occurs for a first percentage of users and then increasing to a second increased percentage of users at a later point in time, and where the feature flag is disabled to roll back a problem with rollout of the software having a problematic feature.” That is, the claims require a set of rules that are locally stored at a client system, and evaluation using a latest version of the set of rules occurs at the client system with a response data cached at the client system to avoid subsequent communications with the feature flag service. Further, the evaluation using the latest version of the set of rules will either enable or disable a feature of the software, and the set of rules distinguishes between static inputs and dynamic inputs such that static inputs are at least partially evaluated and cached at a policy update time rather than evaluated at runtime. Further still, the feature flag corresponds to a conditional feature flag that enables the feature flag for a first user while being disabled for a second user, such that the first user is provided with a first version of the software having the feature enabled while the second user is provided with a second version of the software having the feature disabled, and the conditional feature flag is used for progressive rollouts of the software where enabling the feature occurs for a first percentage of users and then increasing to a second increased percentage of users at a later point in time, and where the feature flag is disabled to roll back a problem with rollout of the software having a problematic feature. The aforementioned limitations and reasons are in conjunction with all other claim limitations and the structure and environment which are not specifically recited in the quotes or expounded upon in the reasons. The Notice of Allowability is based on the totality of the claims. Thus, for at least the foregoing reasons, the prior art of record neither anticipates nor rendered obvious the present invention as set forth in the claims. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Response to Arguments Applicant’s arguments, see Page 11, filed July 23, 2026, with respect to the objection of claims 1-19, §112 rejection of claim 4 and §101 rejection of claims 1-19 for being directed to an abstract idea have been fully considered and are persuasive. The objection of claims 1-19, §112 rejection of claim 4 and §101 rejection of claims 1-19 for being directed to an abstract idea have been withdrawn. Examiner’s Remarks: The Examiner would like to note that in the Final Office Action dated March 23, 2026, the Examiner rejected claims 9-15 under 35 USC §101 for being directed to non-statutory subject matter. The Applicant’s arguments/remarks submitted on July 23, 2026 do not appear to address this rejection. Therefore, this rejection is being maintained as there are no amendments to claim 9 that address this rejection. Phone calls and voicemail were left for Peter Mei (Reg. No. 39,768) but no reply was received. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to LANNY N UNG whose telephone number is (571)270-7708. The examiner can normally be reached Mon-Thurs 6:30am-3:30pm. 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, Bradley Teets can be reached at 571-272-3338. 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. /LANNY N UNG/Primary Examiner, Art Unit 2197
Read full office action

Prosecution Timeline

Show 4 earlier events
Oct 09, 2025
Request for Continued Examination
Oct 16, 2025
Response after Non-Final Action
Nov 17, 2025
Non-Final Rejection mailed — §101
Feb 17, 2026
Response Filed
Mar 23, 2026
Final Rejection mailed — §101
Jul 23, 2026
Request for Continued Examination
Jul 24, 2026
Response after Non-Final Action
Sep 01, 2026
Non-Final Rejection mailed — §101 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12743272
PROGRAM CODE VERSIONS
4y 3m to grant Granted Sep 22, 2026
Patent 12743194
SYSTEMS AND METHODS FOR SEMANTICALLY GOVERNED SPECIFICATION-DRIVEN INTEROPERABILITY IN DISTRIBUTED ENVIRONMENTS
1y 4m to grant Granted Sep 22, 2026
Patent 12724595
GEOGRAPHIC DEPLOYMENT OF APPLICATIONS TO EDGE COMPUTING NODES
3y 8m to grant Granted Sep 01, 2026
Patent 12705041
FIRMWARE STORE FOR UPDATES IN AN INFORMATION HANDLING SYSTEM
3y 1m to grant Granted Aug 11, 2026
Patent 12693852
SYSTEMS AND METHODS FOR REMOTE CODE REVIEW
5y 4m to grant Granted Jul 28, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

5-6
Expected OA Rounds
71%
Grant Probability
97%
With Interview (+25.8%)
3y 4m (~1m remaining)
Median Time to Grant
High
PTA Risk
Based on 512 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month