Prosecution Insights
Last updated: August 06, 2026
Application No. 18/777,525

METHOD FOR OPERATING CABIN AIR FILTRATION SYSTEM OF VEHICLE, COMPUTER PROGRAM, AND ELECTRONIC CONTROL UNIT

Non-Final OA §101
Filed
Jul 18, 2024
Priority
Feb 17, 2022 — EU 22305176 +1 more
Examiner
SEMBER, THOMAS M
Art Unit
Tech Center
Assignee
Mann+hummel GmbH
OA Round
1 (Non-Final)
84%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allowance Rate
1030 granted / 1220 resolved
+24.4% vs TC avg
Moderate +12% lift
Without
With
+11.5%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 10m
Avg Prosecution
18 currently pending
Career history
1231
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
34.1%
-5.9% vs TC avg
§102
33.4%
-6.6% vs TC avg
§112
13.5%
-26.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1220 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 . 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 1-20 are rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. The claim(s) recite(s) the mental concept/mathematical equation of receiving information (i.e. air flow magnitude, vehicle speed, global filtration efficiency, ratio of fresh air and recirculated air, etc.) and calculating a recirculation ratio of the fresh air and the recirculated air. This judicial exception is not integrated into a practical application because the combination of additional elements (e.g. control unit, computer program, NOTE that the method claims are not connected to or contain any physical element) fails to integrate the judicial exception into a practical application. The generically recited computer elements do not add a meaningful limitation to the abstract idea because they amount to simply implementing the abstract idea on a computer. The claim(s) does/do not include additional elements that are sufficient to amount to significantly more than the judicial exception because the additional elements when considered separately and in combination do not add significantly more to the exception. The additional limitations only store, retrieve, or calculate information and these are well-understood, routine, conventional computer functions as recognized by the court decisions listed in MPEP 2106.05. The claims are directed to an abstract idea and/or the end result of the system/method, the essence of the whole, is a patent-ineligible concept. The claims do not include additional elements that are sufficient to amount to significantly more than the judicial exception because they amount to a general computer performing a calculation. The claims are directed to an abstract idea, i.e. implementing the idea of receiving information (i.e. air flow magnitude, vehicle speed, global filtration efficiency, ratio of fresh air and recirculated air, etc.) and calculating a recirculation ratio of the fresh air and the recirculated air, such as may be done by a mental process, critical thinking, and/or paper and pencil, or done by a mathematical equation, with additional generic computer elements, or additional structure (e.g. control unit, computer program, NOTE that the method claims are not connected to or contain any physical element) recited at a high level of generality that perform generic functions routinely used in the art, and do not add a meaningful limitation to the abstract idea because they would be routine in any computer implementation or in the relevant art. Thus, the recited generic computer components perform no more than their basic computer functions. These additional elements are well‐understood, routine and conventional limitations (see cited document(s)) that amount to mere instructions or elements to implement the abstract idea. In addition, the end result of the system/method, the essence of the whole, is a patent-ineligible concept. See the recent decisions by the U.S. Supreme Court, including Alice Corp., Myriad, and Mayo. In addition, the current claims are similar to other recent court decisions dealing with analyzing, comparing, and/or displaying data, such as Electric Power Group, Digitech, Grams, and Classen. Based on the plain meaning of the words in the claim, the broadest reasonable interpretation of the claims (e.g. claim 20 having a control unit/processor, claim 19 being a computer program, and corresponding method claim 1 not containing any physical element) is a system having a processor, wherein the processor is programmed with executable instructions to perform the calculations/mental process/critical thinking. The claims do not impose any limits on how the air flow magnitude, vehicle speed, global filtration efficiency, ratio of fresh air and recirculated air, etc. information is received by the processor, and thus this step covers any and all possible ways in which this can be done, for instance by typing the information into the system, or by the system obtaining the information from another device. The claim also does not impose any limits on how the computations are accomplished, and thus it can be performed in any way known to those of ordinary skill in the art. The calculations are simple enough to be practically performed in the human mind or through critical thinking. Note that even if most humans would use a physical aid (e.g., pen and paper, a slide rule, or a calculator) to help them complete the recited calculation, the use of such physical aid does not negate the mental nature of this limitation. Nor does the recitation of a processor in the claim negate the mental nature of this limitation because the claim here merely uses the processor as a tool to perform the otherwise mental process. The processor/control unit is recited so generically (no details whatsoever are provided other than it is a processor) that it represents no more than mere instructions to apply the judicial exception on a computer. These limitations can also be viewed as nothing more than an attempt to generally link the use of the judicial exception to the technological environment of a computer. It should be noted that because the courts have made it clear that mere physicality or tangibility of an additional element or elements is not a relevant consideration in the eligibility analysis, the physical nature of these computer components does not affect this analysis. See MPEP 2106.05(I) for more information on this point, including explanations from judicial decisions including Alice Corp. Pty. Ltd. v. CLS Bank Int'l, 573 U.S. 208, 224-26 (2014). Although the processor or claim limitations may fall under several exceptions (e.g., a mathematical concept-type abstract idea or a mental process-type abstract idea), there are no bright lines between the types of exceptions. See, e.g., MPEP 2106.04(I). Thus, it is sufficient for the examiner to identify that the limitations align with at least one judicial exception, and to conduct further analysis based on that identification. The limitations of the claims are carried out by the processor/control unit. No element has been set forth to sense the air flow magnitude, vehicle speed, global filtration efficiency, ratio of fresh air and recirculated air, etc. signals, where the processor performs the necessary software tasks so that the result of the abstract mental process is just data/the recirculation ratio. See MPEP 2106.05(g), discussing limitations that the Federal Circuit has considered to be insignificant extra-solution activity. Even when viewed in combination, the additional elements in this claim do no more than automate the mental processes (e.g., the mental computation of receiving information (i.e. air flow magnitude, vehicle speed, global filtration efficiency, ratio of fresh air and recirculated air, etc.) and calculating a recirculation ratio of the fresh air and the recirculated air, etc.), using the computer components as a tool. While this type of automation may improve the life of a practitioner/physician (by minimizing or eliminating the need for mentally computing metrics), there is no change to the computers and other technology that are recited in the claim as automating the abstract ideas, and thus this claim cannot improve computer functionality or other technology. See, e.g., Trading Technologies Int’l v. IBG, Inc., 921 F.3d 1084, 1093 (Fed. Cir. 2019) (using a computer to provide a trader with more information to facilitate market trades improved the business process of market trading, but not the computer) and the cases discussed in MPEP 2106.05(a)(I), particularly FairWarning IP, LLC v. Iatric Sys., 839 F.3d 1089, 1095 (Fed. Cir. 2016) (accelerating a process of analyzing audit log data is not an improvement when the increased speed comes solely from the capabilities of a general-purpose computer) and Credit Acceptance Corp. v. Westlake Services, 859 F.3d 1044, 1055 (Fed. Cir. 2017) (using a generic computer to automate a process of applying to finance a purchase is not an improvement to the computer’s functionality). Accordingly, the claim as a whole does not integrate the recited judicial exception into a practical application and the claim is directed to the judicial exception. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Yates and Sangwan teach air filtration systems for vehicles which are similar to applicant’s invention. Any inquiry concerning this communication or earlier communications from the examiner should be directed to THOMAS M SEMBER whose telephone number is (571)272-2381. The examiner can normally be reached flexing generally from 7 a.m. to 5.00 p.m. M-F. 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, ABDULMAJEED Aziz can be reached at 571-270-5046. 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. /THOMAS M SEMBER/ Primary Examiner, Art Unit 2875
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Prosecution Timeline

Jul 18, 2024
Application Filed
Jul 16, 2026
Non-Final Rejection mailed — §101 (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
84%
Grant Probability
96%
With Interview (+11.5%)
1y 10m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1220 resolved cases by this examiner. Grant probability derived from career allowance rate.

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