Prosecution Insights
Last updated: April 19, 2026
Application No. 18/381,461

FILTER INTERCONNECT UTILIZING CORRELATED MAGNETIC ACTUATION FOR DOWNSTREAM SYSTEM FUNCTION

Final Rejection §103
Filed
Oct 18, 2023
Examiner
GONZALEZ, MADELINE
Art Unit
1773
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Kx Technologies LLC
OA Round
4 (Final)
72%
Grant Probability
Favorable
5-6
OA Rounds
3y 1m
To Grant
88%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allow Rate
583 granted / 805 resolved
+7.4% vs TC avg
Strong +16% interview lift
Without
With
+15.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
29 currently pending
Career history
834
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
43.0%
+3.0% vs TC avg
§102
27.9%
-12.1% vs TC avg
§112
21.2%
-18.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 805 resolved cases

Office Action

§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 . Claim Status Claims 1-20 and 22 have been cancelled. Claims 21, 23-25 and 34-35 are rejected. Claim 26-33 are withdrawn. 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) 21, 23-25 and 34-35 are finally rejected under 35 U.S.C. 103 as being unpatentable over Elsegood (US 2003/0116493). With respect to claims 21, 24-25 and 34, Elsegood discloses a filter 88, as shown in Fig. 1, having: a housing having a body and a top portion, forming a fluid-tight seal with the body, as shown in Fig. 2, and a magnetic adapter 64 (protrusion) integral with or connected to the housing top portion and extending in an axial direction, as shown in Fig. 3; said protrusion 64 comprising ingress and egress fluid ports 86, 71, as shown in Fig. 2; a filter media disposed within the housing body and in fluid communication with said protrusion ingress and egress fluid ports 86, 71, as shown in Fig. 2; and a magnetic ring/array 204 disposed within or connected to the housing top portion protrusion 64 and oriented along a same axis in said axial direction, said magnetic ring/array 204 having a face presenting in said axial direction with respect to the housing body, as shown in Fig. 2. Elsegood lacks a coded polymagnet or array of coded polymagnets comprising a face including a plurality of magnetic field emission sources having positions and polarities relating to a predefined spatial force function that corresponds to a predetermined alignment of the plurality of magnetic field emission sources; wherein the predefined spatial force function is a magnetic repulsion force; and wherein the predefined spatial force function is a magnetic shear force. However, this would have been obvious to one of ordinary skill in the art in order to provide a desired magnetic attachment, since one of ordinary skill would recognize to choose a desired type of magnet according to a desired application. With respect to claim 23, Elsegood discloses elements 400, 406, as shown in Fig. 4, and elements 82, 206, as shown in Fig. 5, which may be considered to be the claimed filter boss or lug extending radially outwards from the housing, as shown in Figs. 4-5. Elsegood lacks the filter boss or lug adapted for mechanically coupling with an alignment thread or channel of a removable locking cover or an alignment thread or channel of a sump of a mating filter manifold. However, this limitation is considered to be a recitation of the intended use of the claimed invention which must result in a structural difference between the claimed invention and the prior art in order to patentably distinguish the claimed invention from the prior art. If the prior art structure is capable of performing the intended use, then it meets the claim. In this case, Elsegood teaches that the elements 400, 406, can be part of a transmission fluid line or a hydraulic fluid line (see paragraph 0037) and elements 82 and 206 coupled to element 68, as shown in Fig. 5. Therefore, it would be obvious that the elements 400, 406, 82, 206, are capable of coupling with another element such as, with an alignment thread or channel of a removable locking cover or an alignment thread or channel of a sump of a mating filter manifold, as claimed by applicant, since Elsegood teaches the claimed structure and therefore, it is inherent and/or obvious that it is capable of performing the intended use. With respect to claim 35, Elsegood discloses wherein said ingress and egress fluid ports present radially outward from said protrusion 404, as shown in Fig. 4. Response to Arguments Applicant’s arguments with respect to claim(s) 21, 23-25, 34-35, have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. In response to applicant’s argument that Chandra lacks the new limitations added to claim 21: Elsegood teaches the new limitations of claim 21, as stated above. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). 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 MADELINE GONZALEZ whose telephone number is (571)272-5502. The examiner can normally be reached M-F 9-5:30. 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, Benjamin Lebron can be reached at 571-272-0475. 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. /MADELINE GONZALEZ/Primary Examiner, Art Unit 1773
Read full office action

Prosecution Timeline

Oct 18, 2023
Application Filed
Nov 07, 2023
Response after Non-Final Action
Nov 07, 2024
Non-Final Rejection — §103
Mar 13, 2025
Response Filed
Apr 25, 2025
Final Rejection — §103
Aug 29, 2025
Request for Continued Examination
Sep 02, 2025
Response after Non-Final Action
Sep 23, 2025
Non-Final Rejection — §103
Jan 26, 2026
Response Filed
Mar 05, 2026
Final Rejection — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12594513
ROTATABLE FILTER
2y 5m to grant Granted Apr 07, 2026
Patent 12594527
METHOD OF MAKING A CARTRIDGE FILTER
2y 5m to grant Granted Apr 07, 2026
Patent 12589329
FLUID SEPARATION WITH SAMPLING UNIT SELECTIVELY COUPLING UPSTREAM AND DOWNSTREAM OF SEPARATION UNIT
2y 5m to grant Granted Mar 31, 2026
Patent 12582928
FILTER CARTRIDGE ASSEMBLY
2y 5m to grant Granted Mar 24, 2026
Patent 12576348
Advanced Fuel Filtration System with Interlocking Cartridge Seal Design
2y 5m to grant Granted Mar 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

5-6
Expected OA Rounds
72%
Grant Probability
88%
With Interview (+15.6%)
3y 1m
Median Time to Grant
High
PTA Risk
Based on 805 resolved cases by this examiner. Grant probability derived from career allow 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