Prosecution Insights
Last updated: October 02, 2026
Application No. 18/677,527

SYSTEM AND METHOD FOR DETERMINING WHETHER TO REPLACE ION FILTER

Final Rejection §102§103
Filed
May 29, 2024
Priority
Jan 22, 2024 — RE 10-2024-0009237
Examiner
POTHEN, FEBA
Art Unit
2858
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Kia Corporation
OA Round
2 (Final)
81%
Grant Probability
Favorable
3-4
OA Rounds
3m
Est. Remaining
92%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allowance Rate
527 granted / 650 resolved
+13.1% vs TC avg
Moderate +11% lift
Without
With
+11.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
24 currently pending
Career history
673
Total Applications
across all art units

Statute-Specific Performance

§101
2.7%
-37.3% vs TC avg
§103
56.6%
+16.6% vs TC avg
§102
20.6%
-19.4% vs TC avg
§112
17.0%
-23.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 650 resolved cases

Office Action

§102 §103
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 . Response to Arguments Applicant's arguments filed 5/4/26 have been fully considered but they are not persuasive. Regarding claim 1, Applicant argues: “Applicant respectfully submits that Park, Loder, Kim, Wang, taken individually or combined, fail to teach or suggest inventive features of the presently claimed invention, wherein the controller is configured to determine a movement value based on the insulation resistance value measured at each of cycles, and the controller is configured to determine whether to replace the ion filter based on at least one of a size of the movement value or a change rate of the movement value, as is called for by claim(s) 1, 14, and 20…a moving average or moving median is calculated based on these accumulated values over multiple cycles to be used as the final movement value. Since the present invention does not merely stop at obtaining a single average value; rather, it performs a two-stage data filtering process that continuously calculates a Moving Average or Moving Median by grouping a specific number of average values calculated for each cycle, it is possible to accurately determine whether replacement of the ion filter is necessary”. Examiner respectfully disagrees. In response to applicant's argument that the references fail to show certain features of the invention, it is noted that the features upon which applicant relies (i.e., “moving average or moving median is calculated based on these accumulated values over multiple cycles”) are not recited in the rejected claim(s). Although the claims are interpreted in light of the specification, limitations from the specification are not read into the claims. See In re Van Geuns, 988 F.2d 1181, 26 USPQ2d 1057 (Fed. Cir. 1993). The claim only explicitly discloses one cycle and does not include a plurality of cycles. Even if the claim recites an insulation resistance value measured at each of cycles, the claim only discloses one cycle and does not disclose any more than one cycle so the “each of cycles” is considered to be the one cycle. If the movement value is comprised of multiple values within multiple cycles and is the inventive aspect, it should be explicitly recited in the claim. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Park et al., US 20220221500 Regarding claim 1, Park discloses a system for determining whether to replace an ion filter, the system comprising: a measurement unit configured for measuring an insulation resistance value of a fuel cell stack while a vehicle or a system is in operation (fig. 1; insulation resistance measurement 200); and a controller operatively connected to the measurement unit and configured to determine whether to replace the ion filter based on the insulation resistance value (Fig. 2; processor 130; ¶[0019]), wherein with one cycle from start to end of operation of the vehicle or the system, the controller is configured to determine a movement value based on the insulation resistance value measured at each of cycles, the movement value is a moving average or a moving median for an average value or a median value of the insulation resistance value (¶[0060]; average value of insulation resistance calculated), and the controller is configured to determine whether to replace the ion filter based on at least one of a size of the movement value or a change rate of the movement value (¶[0064]; difference value between average vale and resistance value is calculated therefore a size of the average value influences a failure condition; [0067]; user notified to replace ion filter). 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 2 is/are rejected under 35 U.S.C. 103 as being unpatentable over Park et al., US 20220221500 in view of Loder et al., US 20220413034 Regarding claim 2, Park discloses wherein the controller is configured to determine whether a first condition for determining whether the size of the movement value is equal to or smaller than a preset threshold is satisfied (¶[0064). Park is silent in whether a second condition for determining whether the change rate of the movement value is smaller than a preset change rate is satisfied, and wherein in response that all of the first condition and the second condition are satisfied, the controller is configured to conclude that the ion filter needs to be replaced. Loder teaches a condition for determining whether the change rate of the movement value is smaller than a preset change rate is satisfied (¶[0104]; moving average compared to threshold), and wherein in response that all of the first condition and the second condition are satisfied, the controller is configured to conclude a fault in the system (¶[0104]; fault based on the moving average value). It would have been obvious to one of ordinary skill in the art before the filing date of the invention to incorporate the teaching of Loder into Park for the benefit of monitoring faults in the system with greater efficiency. Claim 3 is/are rejected under 35 U.S.C. 103 as being unpatentable over Park et al., US 20220221500 in view of Kim, US 20200075977 Regarding claim 3, Park is silent in wherein the controller is configured to count cases where the insulation resistance values measured in one cycle from the start to the end of operation of the vehicle or the system are within a predetermined range, and is configured to determine whether a third condition for determining whether a total count is greater than a preset counting value is satisfied, and wherein in response that all of the first condition, the second condition, and the third condition are satisfied, the controller is configured to conclude that the ion filter needs to be replaced. Kim teaches a controller is configured to count cases where the insulation resistance values measured in one cycle from the start to the end of operation of the vehicle or the system are within a predetermined range, and is configured to determine whether a third condition for determining whether a total count is greater than a preset counting value is satisfied, and wherein in response that the third condition are satisfied, the controller is configured to conclude that the ion filter needs to be replaced (¶[0041]-[0042]; abnormality of insulation resistance dependent on a number of times insulation resistance decreases). It would have been obvious to one of ordinary skill in the art before the filing date of the invention to incorporate the teaching of Kim into Park for the benefit of monitoring faults in the system with greater efficiency. Claim 6, 14, 20 is/are rejected under 35 U.S.C. 103 as being unpatentable over Park et al., US 20220221500 in view of Wang et al., CN 102256130 Regarding claim 6, Park is silent wherein the movement value is determined based on expression values in which the average value or the median value of the insulation resistance values measured within one cycle is coded as a single digit number. Wang teaches expression values in which an average value or the median value measured within one cycle is coded as a single digit number (¶[0006] - “0, 1, 2, 3 are corresponding to the brightness values 0, 85, 170, 255”). It would have been obvious to one of ordinary skill in the art before the filing date of the invention to incorporate the teaching of Wang into Park for the benefit of providing a one digit value for a range of values so that a more simplified value can be obtained by the controller for processing. Regarding claim 14, Park discloses a method of determining whether to replace an ion filter implemented by a controller configured to determine whether to replace the ion filter, the method comprising: determining, by the controller, an average value or a median value of insulation resistance values measured in one cycle from start to end of operation of a vehicle or a system (¶[0066]-[0067]; failure of insulation resistance due to an increase in ionic conductivity; ¶[0011]; processor calculate average value of insulation resistance); determining, by the controller, a plurality of movement values for the expression values; and determining, by the controller, whether to replace the ion filter based on at least one of a size of at least one of the movement values or a change rate of the movement values (¶[0067]; user notified to replace ion filter), wherein the movement value is a moving average or a moving median for an average value or a median value of the insulation resistance values (¶[0011]; processor calculates an average value of insulation resistance). Park is silent in deriving, by the controller, a plurality of expression values in which the average value or the median value of the insulation resistance values measured at each of cycles is coded as a single digit number. Wang teaches expression values in which an average value or the median value measured is coded as a single digit number (¶[0006] - “0, 1, 2, 3 are corresponding to the brightness values 0, 85, 170, 255”). It would have been obvious to one of ordinary skill in the art before the filing date of the invention to incorporate the teaching of Wang into Park for the benefit of providing a one-digit value for a range of values so that a more simplified value can be obtained by the controller for processing. Regarding claim 20, Park discloses a storage medium configured to store computer-readable instructions, wherein the instructions are executed by a processor, and wherein the processor is configured to perform operations of: determining an average value or a median value of insulation resistance values measured in one cycle from start to end of operation of a vehicle or a system (¶[0066]-[0067]; failure of insulation resistance due to an increase in ionic conductivity); ; determining movement values for the expression values and determining whether to replace the ion filter based on at least one of a size of at least one of movement values or a change rate of the movement values(¶[0067]; user notified to replace ion filter), wherein the movement value is a moving average or a moving median for an average value or a median value of the insulation resistance values (¶[0011]; processor calculates an average value). Park is silent in deriving a plurality of expression values in which the average value or the median value of the insulation resistance values measured at each of cycles is coded as a single digit number. Wang teaches expression values in which an average value or the median value measured is coded as a single digit number (¶[0006] - “0, 1, 2, 3 are corresponding to the brightness values 0, 85, 170, 255”). It would have been obvious to one of ordinary skill in the art before the filing date of the invention to incorporate the teaching of Wang into Park for the benefit of providing a one-digit value for a range of values so that a more simplified value can be obtained by the controller for processing. Claim 15 is/are rejected under 35 U.S.C. 103 as being unpatentable over Park et al., US 20220221500 in view of Wang et al., CN 102256130 in view of Loder et al., US 20220413034 Regarding claim 15, Park discloses determining whether a first condition for determining whether the size of the movement value is equal to or smaller than a preset threshold is satisfied (¶[0064). Park is silent in whether a second condition for determining whether the change rate of the movement value is smaller than a preset change rate is satisfied, and concluding, in response that all of the first condition and the second condition are satisfied, that the ion filter needs to be replaced. Loder teaches a condition for determining whether the change rate of the movement value is smaller than a preset change rate is satisfied (¶[0104]; moving average compared to threshold), and wherein in response that all of the first condition and the second condition are satisfied, the controller is configured to conclude a fault in the system (¶[0104]; fault based on the moving average value). It would have been obvious to one of ordinary skill in the art before the filing date of the invention to incorporate the teaching of Loder into Park for the benefit of monitoring faults in the system with greater efficiency. Claim 16 is/are rejected under 35 U.S.C. 103 as being unpatentable over Park et al., US 20220221500 in view of Wang et al., CN 102256130 in view of Kim, US 20200075977 Regarding claim 16, Park is silent in counting cases where the insulation resistance values measured in one cycle from the start to the end of operation of the vehicle or the system are within a predetermined range, and determining whether a third condition for determining whether a total count is greater than a preset counting value is satisfied, and concluding, in response that all of the first condition, the second condition, and the third condition are satisfied, that the ion filter needs to be replaced. Kim teaches e controller is configured to count cases where the insulation resistance values measured in one cycle from the start to the end of operation of the vehicle or the system are within a predetermined range, and is configured to determine whether a third condition for determining whether a total count is greater than a preset counting value is satisfied, and wherein in response that the third condition are satisfied, the controller is configured to conclude that the ion filter needs to be replaced (¶[0041]-[0042]; abnormality of insulation resistance dependent on a number of times insulation resistance decreases). It would have been obvious to one of ordinary skill in the art before the filing date of the invention to incorporate the teaching of Kim into Park for the benefit of monitoring faults in the system with greater efficiency. Allowable Subject Matter Claims 4, 5, 7-13, 17-19 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: Regarding claim 4, prior art does not disclose or suggest: “wherein, in response that the insulation resistance values measured in one cycle are equal to or smaller than a preset number, the controller does not determine whether the third condition is satisfied based on the insulation resistance values measured in the corresponding one cycle” in combination with all the limitations of claim 4. Regarding claim 7, prior art does not disclose or suggest: “wherein five expression values are stored by being converted into one 5-digit number, ten expression values are stored by being converted into one 10-digit number, or nineteen expression values are stored by being converted into one 19-digit number” in combination with all the limitations of claim 7. Regarding claim 8, prior art does not disclose or suggest: “wherein the expression values are stored in a preset first number, the controller is configured to determine the movement value based on the expression values stored in the preset first number, the controller is configured to determine whether to replace the ion filter based on a consecutive preset second number of the movement values, and the preset first number is greater than the preset second number” in combination with all the limitations of claim 8. Regarding claim 17, prior art does not disclose or suggest: wherein the determining of the movement values includes: determining the movement value based on a preset first number of the expression values; and determining whether to replace the ion filter based on a consecutive preset second number of the movement values” in combination with all the limitations of claim 17. Conclusion 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 FEBA POTHEN whose telephone number is (571)272-9219. The examiner can normally be reached 8:30-5:00 PM. 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, Judy Nguyen can be reached at 571-272-2258. 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. /FEBA POTHEN/ Examiner, Art Unit 2858
Read full office action

Prosecution Timeline

May 29, 2024
Application Filed
Feb 04, 2026
Non-Final Rejection mailed — §102, §103
May 04, 2026
Response Filed
Jul 14, 2026
Final Rejection mailed — §102, §103 (current)

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Prosecution Projections

3-4
Expected OA Rounds
81%
Grant Probability
92%
With Interview (+11.2%)
2y 7m (~3m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 650 resolved cases by this examiner. Grant probability derived from career allowance rate.

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