Prosecution Insights
Last updated: April 19, 2026
Application No. 18/261,289

AIR-FLOW APPARATUS

Non-Final OA §103
Filed
Jul 13, 2023
Examiner
LAU, JASON
Art Unit
3762
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Sandrier GmbH
OA Round
1 (Non-Final)
53%
Grant Probability
Moderate
1-2
OA Rounds
3y 4m
To Grant
68%
With Interview

Examiner Intelligence

Grants 53% of resolved cases
53%
Career Allow Rate
470 granted / 880 resolved
-16.6% vs TC avg
Moderate +14% lift
Without
With
+14.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
61 currently pending
Career history
941
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
64.5%
+24.5% vs TC avg
§102
18.8%
-21.2% vs TC avg
§112
15.0%
-25.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 880 resolved cases

Office Action

§103
DETAILED ACTION 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. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claim(s) 1, 9, 11-13, 17 is/are rejected under 35 U.S.C. 103 as being unpatentable over Helbling (US 3744149 A) in view of Yu (CN 209884733 U). Regarding claim 1, Helbling discloses an air-flow apparatus which is arranged for treating air and for drying an object, in particular a human hand, the air-flow apparatus comprising: a housing having an interior space (5) into which the object to be dried is insertable via an opening, and having a base opposite the opening (bottom portion of the housing); a suction pump (14) which is connected on an inlet side to the interior space in such a way that, by means of a pumping action of the pump, a negative pressure is generated in the interior space and a first air flow directed from the opening exclusively into the interior space, is generated for drying the object, the pump being designed for discharging on an outlet side an outlet air flow passing through the pump (col. 1, lines 58-63); and a flow arrangement which has a controllable overpressure generating device (2), an inflow pipe (4 alone, or 4+11+12) and at least one nozzle (downstream end of the inflow pipe and opening into space 5), the controllable overpressure generating device being connected on its outlet side via the inflow pipe and the at least one nozzle to the interior space and being adapted to form an overpressure in the inflow pipe and to generate via the at least one nozzle a second air flow directed into the interior space for drying the object. Helbling fails to disclose: a partially opened lid of the housing Yu teaches a foot cleaning device comprising two openings for a user to insert their feet, and where each opening is formed by a partially opened lid (6) (see pg. 3, the lid 6 is provided with a pull rope to adjust the size of the opening). The purpose of the adjustable lid is prevent loss of heat (see bottom of pg. 3) It would have been obvious to a person skilled in the art at the time of effective filing of the application to modify Helbling to include an adjustable partially opened lid of the housing. The motivation to combine is so that once a user sticks their hand into the interior space, the lid can partially close around the wrist of the user, thereby reducing the loss of heat (note: Helbling discloses a heater 3). The result of reduced heat loss is faster drying. Regarding claim 9, modified Yu discloses the air-flow apparatus according to claim 1, wherein the first air flow is greater than the second air flow and the negative pressure in the interior space generated by the pump is greater in amount than a positive pressure in the interior space generated by the overpressure generating device (Yu; col. 1, lines 58-63). Regarding claim 11, modified Yu discloses the air-flow apparatus according to claim 1, wherein a unit for discharging and/or decontaminating (Yu, filter 18) the outlet air flow, in particular the outlet air flow contaminated with germs, is fitted to an inlet pipe and/or to an outlet pipe of the pump. Regarding claim 12, modified Yu discloses the air-flow apparatus according to claim 1, except wherein the overpressure generating device is formed by a further pump. However, a mere duplication of the pump has no patentable significance unless a new and unexpected result is produced. See MPEP 2144.04 (VI)(B). Regarding claim 13, modified Yu discloses the air-flow apparatus according to claim 12, further comprising a filter system (Yu, filter 18) for purifying ambient air drawn in by the further pump via an inlet. Regarding claim 17, modified Yu discloses (see Yu for citations) the air-flow apparatus according to claim 1, wherein a plurality of suction zones (11, 12) are provided in the base and/or on side walls of the interior space; the pump (14) is additionally connected (fluidly connected) to the interior space on its inlet side via at least one suction line (air space downstream the exhaust holes 13 and upstream the pump 14); and the at least one suction line opens (via exhaust holes 13) into the interior space (5) near the partially opened lid (the inlet into space 5 is modified to have a lid) in such a way that an air flow parallel or substantially parallel to the lid is generated (the figure shows a bend at each of the lines 11 and 12, where the air flow is approximately parallel to the inlet into the space 5. Allowable Subject Matter Claims 2-8, 10, 14-16 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. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to JASON LAU whose telephone number is (571)270-7644. The examiner can normally be reached Mon-Fri 8:00-5:00. 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, Michael Hoang can be reached at 571-272-6460. 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. /JASON LAU/Primary Examiner, Art Unit 3762
Read full office action

Prosecution Timeline

Jul 13, 2023
Application Filed
Feb 02, 2026
Non-Final Rejection — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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2y 5m to grant Granted Apr 14, 2026
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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
53%
Grant Probability
68%
With Interview (+14.3%)
3y 4m
Median Time to Grant
Low
PTA Risk
Based on 880 resolved cases by this examiner. Grant probability derived from career allow rate.

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