Prosecution Insights
Last updated: April 19, 2026
Application No. 18/466,410

FILTER ELEMENT AND FILTER SYSTEM

Non-Final OA §102
Filed
Sep 13, 2023
Examiner
ALI, WAQAAS A
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
MANN+HUMMEL GMBH
OA Round
1 (Non-Final)
81%
Grant Probability
Favorable
1-2
OA Rounds
2y 8m
To Grant
99%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allow Rate
432 granted / 535 resolved
+15.7% vs TC avg
Strong +18% interview lift
Without
With
+18.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
30 currently pending
Career history
565
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
38.2%
-1.8% vs TC avg
§102
29.6%
-10.4% vs TC avg
§112
22.0%
-18.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 535 resolved cases

Office Action

§102
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 Claims(s) 1-20, is/are filed on 1/6/2026 are currently pending. Claim(s) 1-15 is/are withdrawn without traverse, 16-20 is/are rejected. Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of the appropriate paragraphs of pre-AIA 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. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim(s) 16-20 is/are rejected under 35 U.S.C. 102 (a)(1) as being anticipated by THOMAS (DE 102017005797 A1). [AltContent: connector][AltContent: textbox (Seal surface for the support pipe)] PNG media_image1.png 880 620 media_image1.png Greyscale PNG media_image2.png 840 595 media_image2.png Greyscale Regarding claim 16, THOMAS teaches a filter element for a filter system, the filter element comprising: a filter medium (12) formed to a hollow body about a longitudinal axis (L); a first end disk (14) arranged at a first end face (26) of the filter medium (12) and a second end disk (16) arranged at an oppositely positioned second end face (28) of the filter medium (12); the first end disk (14) comprising a first central opening (15) and extending in an annular shape about the first end face (26); the second end disk (16) comprising a second central opening (17) and extending in an annular shape about the second end face (28); wherein a seal surface (20) of a seal interface or a region of a seal interface is arranged at the second end face (28) configured to be positioned as intended opposite an outlet (108) of the filter system in an installed state of the filter element (10) in the filter system (100) (p. 2-5). Regarding claim 17, THOMAS teaches further comprising a support pipe (30), wherein the filter medium is arranged about the support pipe, and wherein the support pipe comprises the seal surface of the seal interface (see fig. above). Claim(s) 16-20 is/are rejected under 35 U.S.C. 102 (a)(1) as being anticipated by MOSCARITOLO (US 20040065602 A1). [AltContent: textbox (Socket)][AltContent: textbox (Seal surface for the support pipe)][AltContent: arrow][AltContent: arrow][AltContent: arrow][AltContent: textbox (Seal surface for the support pipe)] PNG media_image3.png 648 949 media_image3.png Greyscale PNG media_image4.png 660 697 media_image4.png Greyscale PNG media_image5.png 668 454 media_image5.png Greyscale Regarding claim 16, MOSCARITOLO teaches a filter element for a filter system, the filter element comprising: a filter medium (140) formed to a hollow body about a longitudinal axis; a first end disk (151) arranged at a first end face (top) of the filter medium and a second end disk (153) arranged at an oppositely positioned second end face of the filter medium; the first end disk comprising a first central opening (top central opening which 110 is connected to) and extending in an annular shape about the first end face; the second end disk comprising a second central opening (bottom central opening where 110 is connected to) and extending in an annular shape about the second end face; wherein a seal surface (115) of a seal interface or a region of a seal interface is arranged at the second end face configured to be positioned as intended opposite an outlet (125) of the filter system in an installed state of the filter element in the filter system [0025-0052]. Regarding claim 17, MOSCARITOLO teaches further comprising a support pipe (110), wherein the filter medium is arranged about the support pipe, and wherein the support pipe comprises the seal surface (inner lateral surface of groove where 115 seal is formed) of the seal interface. Regarding claim 18, MOSCARITOLO teaches wherein the support pipe comprises a radially inwardly projecting rim and wherein the seal surface of the seal interface is arranged at the radially inwardly projecting rim (inner radial surface of the groove where 115 seal is formed). Regarding claim 19, MOSCARITOLO teaches a filter element comprising: a support pipe (110); a filter medium arranged as a single layer on the support pipe; a circumferentially extending socket (see fig. above) arranged at a first end face of the filter medium and projecting in an axial direction; a cover (116) arranged at the oppositely positioned second end face of the filter medium; wherein the cover comprises a seal surface or a seal element (115), which seal surface or seal element, in an installed state of the filter element in the filter system, is configured to form as intended a seal interface together with another filter element [0025-0052]. Regarding claim 20, MOSCARITOLO teaches wherein the cover comprises a circumferentially extending projection (111) projecting in the axial direction away from the cover, wherein the circumferentially extending projection carries the seal element. *** It is noted that any citations to specific, pages, columns, lines, or figures in the prior art references and any interpretation of the reference should not be considered to be limiting in any way. A reference is relevant for all it contains and may be relied upon for all that it would have reasonably suggested to one having ordinary skill in the art. See MPEP 2123. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to Waqaas Ali whose telephone number is (571) 270-0235. The examiner can normally be reached on M-F 9-5 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, Claire Wang can be reached on 571-270-1051. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /WAQAAS ALI/Primary Examiner, Art Unit 1777
Read full office action

Prosecution Timeline

Sep 13, 2023
Application Filed
Feb 07, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12599856
FLUID FILTER SYSTEM WITH AUTO DRAIN
2y 5m to grant Granted Apr 14, 2026
Patent 12600647
WATER PURIFICATION AND METHOD FOR PURIFYING WATER
2y 5m to grant Granted Apr 14, 2026
Patent 12599855
DOUBLE FILTER APPARATUS INCLUDING GAS SUPPLY TUBE AND SYSTEM INCLUDING THE SAME
2y 5m to grant Granted Apr 14, 2026
Patent 12589338
FILTER AND FILTER DEVICE
2y 5m to grant Granted Mar 31, 2026
Patent 12584193
SEPARATION OF RARE EARTH ELEMENTS
2y 5m to grant Granted Mar 24, 2026
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
81%
Grant Probability
99%
With Interview (+18.3%)
2y 8m
Median Time to Grant
Low
PTA Risk
Based on 535 resolved cases by this examiner. Grant probability derived from career allow rate.

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