Prosecution Insights
Last updated: April 18, 2026
Application No. 18/740,821

Cooling Apparatus for a Control Unit of a Magnetic Resonance Device

Non-Final OA §103
Filed
Jun 12, 2024
Examiner
WENDEROTH, FREDERICK
Art Unit
2852
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Siemens Healthineers AG
OA Round
1 (Non-Final)
93%
Grant Probability
Favorable
1-2
OA Rounds
2y 4m
To Grant
90%
With Interview

Examiner Intelligence

Grants 93% — above average
93%
Career Allow Rate
675 granted / 726 resolved
+25.0% vs TC avg
Minimal -3% lift
Without
With
+-2.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
22 currently pending
Career history
748
Total Applications
across all art units

Statute-Specific Performance

§101
17.8%
-22.2% vs TC avg
§103
60.0%
+20.0% vs TC avg
§102
9.3%
-30.7% vs TC avg
§112
12.0%
-28.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 726 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 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) 1, 11, 12, 15 is/are rejected under 35 U.S.C. 103 as being unpatentable over Sebastian (DE-102007033548-B4) in view of Wang (CN-2345237-Y) in view of Yildiz (US-20210034101-A1). Regarding claim 1 Sebastian discloses A cooling apparatus (¶ 10 under Description), comprising: A control unit (¶ 4 – 6 under Description) for a detector (¶ 34 under Description) of a magnetic resonance device (¶ 10 under Description), the control unit comprising at least two electronic components that generate heat during operation of the magnetic resonance device (¶ 3 under Description), Sebastian does not disclose “wherein the control unit is configured to be arranged on a surface of the detector; and an active cooling unit comprising at least one piezoelectric fan, wherein the at least one piezoelectric fan is configured to direct an airflow on a surface of the control unit and/or on a surface of at least one of the at least two electronic components”. Wang, however, teaches Wherein the control unit is configured to be arranged on a surface of the detector (¶ 8 under INVENTION-TITLE), Sebastian in view of Wang do not disclose “an active cooling unit comprising at least one piezoelectric fan, wherein the at least one piezoelectric fan is configured to direct an airflow on a surface of the control unit and/or on a surface of at least one of the at least two electronic components,” Yildiz, however, teaches an active cooling unit ([0007]) comprising at least one piezoelectric fan ([0038]), wherein the at least one piezoelectric fan is configured to direct an airflow on a surface of the control unit and/or on a surface of at least one of the at least two electronic components ([0038], the embedded controller contains many electronic components, so at least “two”). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to include the “control unit on the surface of the detector” as taught by Wang as well as the “piezo cooling fans” of Yildiz in the apparatus of Sebastian. The justification for this modification would be to 1) use a compact control/detector unit that takes up very little space, and 2) use a fan that generates little to no EMI interference. Regarding claim 11 Sebastian in view of Wang in view of Yildiz teach the cooling apparatus as claimed in claim 1, Yildiz wherein: the control unit comprises at least four electronic components and at least three gaps ([0038]), two of the at least four electronic components are arranged next to each other and spaced apart from one another by a gap in each of the at least three gaps ([0038]), the active cooling unit is configured to generate an airflow through at least one of the at least three gaps, and each of the at least four electronic components has a heat surface and is arranged such that at least one of the at least three gaps is free of a facing heat surface and is free of a piezoelectric fan assigned to the gap ([0038]). Regarding claim 12 Sebastian in view of Wang in view of Yildiz teach the cooling apparatus as claimed in claim 1, Yildiz, applied to claim 12, further teaches wherein: the at least two electronic components each comprise surface elements arranged parallel to each other and spaced apart from each other by a gap, and the control unit is configured to be arranged on the surface of the detector unit such that flat surfaces of the surface elements the at least two electronic components are arranged perpendicular to a surface of the detector ([0038]). Regarding claim 15 Sebastian discloses A magnetic resonance device (¶ 10 under Description), comprising: A detector (¶ 34 under Description); and A cooling apparatus for a control unit (¶ 4 – 6 under Description) of the magnetic resonance device, wherein the cooling apparatus (¶ 10 under Description) comprises: At least two electronic components that generate heat during operation of the magnetic resonance device (¶ 3 under Description), Sebastian does not disclose “Wherein the control unit is configured to be arranged on a surface of the detector; and an active cooling unit comprising at least one piezoelectric fan, and wherein the at least one piezoelectric fan is configured to direct an airflow on a surface of the control unit and/or on a surface of at least one of the at least two electronic components”. Wang, however, teaches Wherein the control unit is configured to be arranged on a surface of the detector; and (¶ 8 under INVENTION-TITLE) Sebastian in view of Wang do not disclose “an active cooling unit comprising at least one piezoelectric fan, and wherein the at least one piezoelectric fan is configured to direct an airflow on a surface of the control unit and/or on a surface of at least one of the at least two electronic components.” Yildiz, however, discloses an active cooling unit ([0007]) comprising at least one piezoelectric fan ([0038]), and wherein the at least one piezoelectric fan is configured to direct an airflow on a surface of the control unit and/or on a surface of at least one of the at least two electronic components ([0038], the embedded controller contains many electronic components, so at least “two”) It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to include the “control unit on the surface of the detector” as taught by Wang as well as the “piezo cooling fans” of Yildiz in the apparatus of Sebastian. The justification for this modification would be to 1) use a compact control/detector unit that takes up very little space, and 2) use a fan that generates little to no EMI interference. Claim(s) 2 – 4 & 9, 10 is/are rejected under 35 U.S.C. 103 as being unpatentable over Sebastian (DE-102007033548-B4) in view of Wang (CN 2345237-Y) in view of Yildiz (US-20210034101-A1) in view of Name Not Available (JP-S6293670-U). Regarding claim 2 Sebastian in view of Wang in view of Yildiz teach the cooling apparatus as claimed in claim 1, Although strongly implied, Sebastian in view of Wang in view of Yildiz do not disclose “wherein the at least two electronic components of the control unit are arranged next to each other and spaced apart from one another via a gap, and wherein the active cooling unit is configured to direct the airflow through the gap”. Name Not Available, however, teaches wherein the at least two electronic components of the control unit are arranged next to each other and spaced apart from one another via a gap, and wherein the active cooling unit is configured to direct the airflow through the gap (¶ 1 under [Detailed explanation of the device] & Fig. 162, the many fins of the cooling mechanism are the at least two electronic components that are spaced apart with a gap). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to include the “spaced apart components with airflow through the gaps” as taught by Name Not Available in the apparatus of Sebastian in view of Wang in view of Yildiz. The justification for this modification would be to more efficiently cool the electronics. Regarding claim 3 Sebastian in view of Wang in view of Yildiz in view of Name Not Available teach the cooling apparatus as claimed in claim 2, Name Not Available, applied to claim 3, further teaches the active cooling unit comprises at least two piezoelectric fans that are configured to direct an airflow through the gap (¶ 1, [Detailed explanation of the device] & Figures on page 162), the at least two piezoelectric fans are arranged at an opening in the gap at equal distances from at least one of the at least two electronic components and spaced apart from one another by the gap, (¶ 1, [Detailed explanation of the device] & Figures on page 162) and when the cooling apparatus is arranged on the surface of the detector, the at least two piezoelectric fans are each disposed a different distance from the surface of the detector (¶ 1, [Detailed explanation of the device] & Figures on page 162). Regarding claim 4 Sebastian in view of Wang in view of Yildiz in view of Name Not Available teach the cooling apparatus as claimed in claim 2, Name Not Available, applied to claim 4, further teaches wherein: the active cooling unit comprises at least two piezoelectric fans that are configured to direct an airflow through the gap, the at least two piezoelectric fans are arranged at an opening of the gap with different distances from the at least one of the at least two electronic component and spaced apart from one another by the gap, and when the cooling apparatus is arranged on the surface of the detector, the at least two piezoelectric fans are each disposed an identical distance from the surface of the detector (¶ 1, [Detailed explanation of the device]). Regarding claim 9 Sebastian in view of Wang in view of Yildiz in view of Name Not Available teach the cooling apparatus as claimed in claim 2, Name Not Available, applied to claim 9, further teaches wherein each of the at least two electronic components has a heat surface, and are arranged such that one heat surface per respective one of the at least two electronic faces the gap, and wherein the at least one piezoelectric fan is configured to direct the airflow through the gap (¶ 1, [Detailed explanation of the device]). Regarding claim 10 Sebastian in view of Wang in view of Yildiz in view of Name Not Available teach the cooling apparatus as claimed in claim 2, Name Not Available, applied to claim 10, further teaches Sebastian in view of Wang in view of Yildiz do not teach wherein each one of the at least two electronic components comprises a heat surface, and are arranged such that respective heat surfaces of the at least two electronic components face the gap, and wherein the at least one piezoelectric fan is configured to direct the airflow through the gap (¶ 1, [Detailed explanation of the device]). Claim(s) 13, 14 is/are rejected under 35 U.S.C. 103 as being unpatentable over Sebastian (DE-102007033548-B4) in view of Wang (CN-2345237-Y) in view of Yildiz (US-20210034101-A1) in view of Mueller et al. (US-20200100742-A1). Regarding claim 13 Sebastian in view of Wang in view of Yildiz teach the cooling apparatus as claimed in claim 1, Sebastian in view of Wang in view of Yildiz do not teach “further comprising: a passive cooling unit comprising a cooling element arranged on a surface of one of the at least two electronic components”. Mueller, however, teaches a passive cooling unit comprising a cooling element arranged on a surface of one of the at least two electronic components ([0135]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to include the “passive surface cooling facility” as taught by Mueller in the apparatus of Sebastian in view of Wang in view of Yildiz. The justification for this modification would be to have a passive way to cool the controller. Regarding claim 14 Sebastian in view of Wang in view of Yildiz in view of Mueller teach the cooling apparatus as claimed in claim 13, Mueller, applied to claim 14, further teaches wherein the cooling element comprises a plurality of fins parallel to one another in a form of elevations perpendicular to a surface of the at least two electronic components, and wherein the active cooling unit is configured to direct an airflow along the fins ([0135], the cooling fins are perpendicular to the docking station that contains the two electronic components). Allowable Subject Matter Claims 5 – 8 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. Regarding claim 5 Nothing in the prior art of record teaches or discloses “when the control unit is arranged on the surface of the detector, a longitudinal side of the at least one electronic component and the gap run predominantly in a vertical direction, and wherein the vertical direction is with respect to the magnetic resonance device and is perpendicular to a direction in which a patient is moved into and out of a patient receiving area of the magnetic resonance device”. In conjunction with the rest of the claim language. Regarding claims 6 – 8 The claims are allowable due to their dependencies on objected-to claim 5. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to FREDERICK WENDEROTH whose telephone number is (571)270-1945. The examiner can normally be reached M-F 7 a.m. - 4 p.m. 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, Walter Lindsay can be reached at 571-272-1674. 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. /WALTER L LINDSAY JR/Supervisory Patent Examiner, Art Unit 2852 /Frederick Wenderoth/ Examiner, Art Unit 2852
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Prosecution Timeline

Jun 12, 2024
Application Filed
Jan 04, 2026
Non-Final Rejection — §103
Mar 31, 2026
Response Filed

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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
93%
Grant Probability
90%
With Interview (-2.8%)
2y 4m
Median Time to Grant
Low
PTA Risk
Based on 726 resolved cases by this examiner. Grant probability derived from career allow rate.

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