Prosecution Insights
Last updated: October 01, 2026
Application No. 18/846,191

HEAT SINK, ELECTRONIC DEVICE, AND CIRCUIT BOARD

Non-Final OA §102§103§112
Filed
Sep 11, 2024
Priority
Apr 02, 2022 — CN 202210351427.0 +4 more
Examiner
BUTTAR, MANDEEP S
Art Unit
Tech Center
Assignee
Canaan Creative Co. Ltd.
OA Round
1 (Non-Final)
80%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allowance Rate
441 granted / 553 resolved
+19.7% vs TC avg
Strong +16% interview lift
Without
With
+16.0%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 1m
Avg Prosecution
16 currently pending
Career history
563
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
58.1%
+18.1% vs TC avg
§102
26.6%
-13.4% vs TC avg
§112
10.6%
-29.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 553 resolved cases

Office Action

§102 §103 §112
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 . Priority Receipt is acknowledged of certified copies of papers required by 37 CFR 1.55. Information Disclosure Statement The information disclosure statement (IDS) submitted on 9/11/2024 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Chen was disclosed in the IDS. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claim 13 is rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Claim 13 recites “the circuit board is adapted to be placed in the heat dissipation channels”, which is unclear to the office. The specification lacks any disclosure regarding placing a circuit board within a heat dissipation channel. The office is unsure how that is even possible, as the gaps between adjacent fins are very narrow. The office will interpret said limitation as the circuit board is placed in thermal connection with a heat dissipation channel. Claim 15 is rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Claim 15 recites “the circuit board is adapted to be placed in the heat dissipation channels”, which is unclear to the office. The specification lacks any disclosure regarding placing a circuit board within a heat dissipation channel. The office is unsure how that is even possible, as the gaps between adjacent fins are very narrow. The office will interpret said limitation as the circuit board is placed in thermal connection with a heat dissipation channel. Dependent claim 16 is also rejected under 112(a) as being dependent upon claim 15. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claim 13 rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 15 recites “the circuit board is placed in a heat dissipation channel”, however, the office is unclear to how this arrangement works. The claims lacks any details to where or how the heat dissipation channels are formed/located; therefore, the office will interpret said limitation as the circuit board is placed in thermal connection with a heat dissipation channel. Claim 15 rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 15 recites “the circuit board is placed in a heat dissipation channel”, however, the office is unclear to how this arrangement works. The claims lacks any details to where or how the heat dissipation channels are formed/located; therefore, the office will interpret said limitation as the circuit board is placed in thermal connection with a heat dissipation channel. Dependent claim 16 is also rejected under 112(b) as being dependent upon claim 15. Drawings The drawings are objected to under 37 CFR 1.83(a). The drawings must show every feature of the invention specified in the claims. Therefore, the “the circuit board is adapted to be placed in the heat dissipation channels” in claim 13 must be shown or the feature(s) canceled from the claim(s). No new matter should be entered. The drawings are objected to under 37 CFR 1.83(a). The drawings must show every feature of the invention specified in the claims. Therefore, the “a guide strip is provided on one of the shell and the heat sinks & a guide slot is formed on the other of the shell” in claim 14 must be shown or the feature(s) canceled from the claim(s). No new matter should be entered. The drawings are objected to under 37 CFR 1.83(a). The drawings must show every feature of the invention specified in the claims. Therefore, the “the circuit board is adapted to be placed in heat dissipation channels” in claim 15 must be shown or the feature(s) canceled from the claim(s). No new matter should be entered. The drawings are objected to under 37 CFR 1.83(a). The drawings must show every feature of the invention specified in the claims. Therefore, the “a plurality of heat sinks of any one of claim 1, wherein the heat sinks are disposed on the first side or a second side of the circuit board.” in claim 9 must be shown or the feature(s) canceled from the claim(s). The drawings only disclose a single heat sink disposed on either side, no figures discloses multiple heatsinks disposed on either side. The office will interpret said limitation as the heat sink disposed on the first side or second side. No new matter should be entered. Corrected drawing sheets in compliance with 37 CFR 1.121(d) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. The figure or figure number of an amended drawing should not be labeled as “amended.” If a drawing figure is to be canceled, the appropriate figure must be removed from the replacement sheet, and where necessary, the remaining figures must be renumbered and appropriate changes made to the brief description of the several views of the drawings for consistency. Additional replacement sheets may be necessary to show the renumbering of the remaining figures. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. 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 (i.e., changing from AIA to pre-AIA ) 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 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. Claims 1-4, 6-8, and 15 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Zhang (U.S 2009/0120612 A1). In regards to Claim 1, Zhang discloses a heat sink, comprising: a base (Fig.2, #12); and a plurality of heat dissipation fins (Fig.2, #14) disposed on the base at intervals along a first direction (Fig.2, #144 extends upwards (vertical direction)), wherein two of the heat dissipation fins adjacent to each other and the base jointly define a heat dissipation channel (Fig.2, #140 is the heat dissipation channels) extending along a second direction perpendicular to the first direction (Fig.2, #140 extends (horizontal) perpendicular to the first direction (vertical) In regards to Claim 2, Zhang discloses the heat sink of claim 1, wherein, along the first direction or the second direction, the heat dissipation capacity of at least part of the heat dissipation fins in at least one end region is less than the heat dissipation capacity of at least part of the heat dissipation fins located in a middle region (Fig.2 and paragraph [0019], which discloses the heat dissipation capacity of the fins is less at one end region (shorter fins) compared to the fins located in the middle region (higher fins)) In regards to Claim 3, Zhang discloses the heat sink of claim 1, wherein, along the first direction or the second direction, the overall rib face efficiency of at least part of the heat dissipation fins in at least one end region is less than the overall rib face efficiency of at least part of the heat dissipation fins located in a middle region (Fig.2 #144 and the end region has less rib face efficiency than the middle region fins due to their surface area’s being different in size). In regards to Claim 4, Zhang discloses the heat sink of claim 1, wherein, along the first direction or the second direction, the height of at least part of the heat dissipation fins in at least one end region is less than the height of at least part of the heat dissipation fins located in a middle region (Fig.2 and paragraph [0019], discloses fins #144 at one end region is less than the height of fins #144 in the middle region). In regards to Claim 6, Zhang discloses the heat sink of claim 1, wherein, along the first direction or the second direction, the surface area of at least part of the heat dissipation fins in at least one end region is less than the surface area of at least part of the heat dissipation fins located in a middle region ((Fig.2 and paragraph [0019], discloses fins #144 at one end region has less surface area (total size) than the surface area of fins #144 in the middle region). In regards to Claim 7, Zhang discloses the heat sink of claim 1, wherein, along the first direction or the second direction, the thermal conductivity of at least part of the heat dissipation fins in at least one end region is less than the thermal conductivity of at least part of the heat dissipation fins located in a middle region (Fig.2 and paragraph [0019], discloses fins #144 at one end region has less surface area which would result in less thermal conductivity than the fins #144 in the middle region having greater surface area, thus greater thermal conductivity). In regards to Claim 8, Zhang discloses the heat sink of claim 1, wherein, along the first direction or the second direction, the height of at least one end of at least one of the heat dissipation fins is less than the height of a middle portion of the heat dissipation fin (Fig.2 and paragraph [0019], discloses #144 at the one end region has fins of less height compared to the fins located in the middle region). In regards to Claim 15, Zhang discloses a circuit board, comprising: a substrate (Fig.1, #22 which can be a single circuit board (substrate), see paragraph [0018]); and a plurality of heat generation components (Fig.2, #24) disposed on a first side of the substrate (Fig.1), wherein the plurality of heat generation components is disposed at intervals along a first direction to define a plurality of heat dissipation gaps (Fig.1, #24 are placed having gaps between the next component #24, which are consider the heat dissipation gaps) the circuit board is adapted to be placed in heat dissipation channels (Fig.1, #22 is thermally connected to the heat dissipation channels #140 formed via fins #144), and the first direction is a direction perpendicular to an extending direction of the heat dissipation channels (Fig.2, #144 extend in the vertical direction while the heat dissipation channels extend in perpendicularly to the first (horizontal direction). Claims 1-4, 6-8, and 15 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Chen (CN 111867338 A). In regards to Claim 1, Chen disclose a heat sink (Fig.4), comprising: a base (Fig.4, #30 includes a base); and a plurality of heat dissipation fins (Fig.4, #31) disposed on the base at intervals along a first direction (Fig.4), wherein two of the heat dissipation fins adjacent to each other and the base jointly define a heat dissipation channel (Fig.4, gaps between #31 are heat dissipation channels) extending along a second direction perpendicular to the first direction (Fig.4, the gaps run horizontal perpendicular to the extending directions of the channels). In regards to Claim 5, Chen discloses the heat sink of claim 1, Wherein, along the first direction or the second direction, the width of at least part of the heat dissipation channels in at least one end region is greater than the width of at least part of the heat dissipation channels located in a middle region (Fig.4, #30 includes at least one end region where the width between fins #31 is greater, than the width between fins #31 in the middle region). In regards to Claim 9, Chen discloses the heat sink of claim 1, An electronic device, comprising: a circuit board (Fig.4, #20) having a first side provided with a plurality of heat generation components (Fig.6, discloses a plurality of heat generating components); and a plurality of heat sinks are disposed on the first side or a second side of the circuit board (Fig.4, plurality of heat sinks #30 are placed on the first side and second side of #20). In regards to Claim 10, Chen discloses the heat sink of claim 9, wherein the heat sinks comprise a first heat sink disposed on the first side (Fig.4, #30 disposed on the top side (first side)), and a base of the first heat sink is at least partially in contact with the corresponding heat generation component(s) (Fig.4, #30 includes a base which is in thermal contact with #21 disposed on #20). In regards to Claim 13, Chen discloses the heat sink of claim 9, wherein the plurality of heat generation components are disposed at intervals along the first direction to define a plurality of heat dissipation gaps (Fig.6, different rows of heat generating components having gaps), the circuit board is adapted to be placed in the heat dissipation channels (Fig.6, #20 is in thermally connection with the heat dissipation channels formed on heat sink #30), and, along the first direction or the second direction (Fig.6), the dimension of at least part of the heat dissipation gaps in at least one end region (Fig.6, #23 left end region) is less than the dimension of at least part of the heat dissipation gaps located in a middle region (Fig.6, middle of #20 includes #24 which include gaps bigger than the one end region on the left). In regards to Claim 13, Chen discloses the heat sink of claim 9, further comprising: a shell (Fig.2, #10), wherein an accommodating cavity is defined in the shell (Fig.2), the circuit board and the heat sinks are both located in the accommodating cavity (Fig.1, #30 and #20 are located within #10), a guide strip is provided on one of the shell and the heat sinks (Fig.2), a guide slot (Fig.3, #30 each include a guide slot at the edge) is formed on the other of the shell and the heat sinks, and the guide strip is movably fitted in the guide slot (Fig.2-3). In regards to Claim 15, Chen discloses a circuit board, comprising: a substrate (Fig.2-6, #20); and a plurality of heat generation components disposed on a first side of the substrate (Fig.6), wherein the plurality of heat generation components is disposed at intervals along a first direction to define a plurality of heat dissipation gaps (Fig.6), the circuit board is adapted to be placed in heat dissipation channels (Fig.6, #20 is in thermally connection with the heat dissipation channels formed on heat sink #30), and the first direction is a direction perpendicular to an extending direction of the heat dissipation channels (Fig.4-6, extending direction is perpendicular to the first direction). In regards to Claim 16, Chen discloses the circuit board of claim 15, wherein, along the first direction or the extending direction of the heat dissipation channel, the dimension of at least part of the heat dissipation gaps in at least one end region (Fig.6, #23 left end region having small gaps between components) is less than the dimension of at least part of the heat dissipation gaps located in a middle region (Fig.6, middle of #20 includes #24 which include gaps bigger than the one end region on the left #23). Claim Rejections - 35 USC § 103 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 (i.e., changing from AIA to pre-AIA ) 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 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 11 is rejected under 35 U.S.C. 103 as being unpatentable over Chen (CN 111867338 A) in view of Lin (U.S 2011/0197950 A1). In regards to Claim 11, Chen discloses the heat sink of claim 10. Chen fails to disclose: Wherein an insulating layer is disposed on the first heat sink, and the insulating layer at least partially covers a surface of the first heat sink. However, Lin discloses: Wherein an insulating layer (Fig.2, #40) is disposed on the first heat sink (Fig.2, #20 is disposed on the backside of #20), and the insulating layer at least partially covers a surface of the first heat sink (Fig.2, #40 covers the rear or back surface of #20, as such the office notes that with the combination of Chen in view of Lin, the first heat sink and circuit board having a plurality of components (as taught by Chen) would be modified to include an insulating layer between said board and heat sink (as taught by Lin) to prevent any accidental shorts between the heat sink and circuit board). Therefore, it would of have been obvious to one of ordinary skill in the art at the time the application was filed to have modified the first heat sink and circuit board having a plurality of components (as taught by Chen) to include an insulating layer between said board and heat sink (as taught by Lin) to prevent any accidental shorts between the heat sink and circuit board. By utilizing an insulating layer between the components and heatsink, would ensure that shorts would be created during use. Claim 12 is rejected under 35 U.S.C. 103 as being unpatentable over Chen (CN 111867338 A) in view of Chou (U.S 2009/0122480 A1). In regards to Claim 12, Chen discloses the heat sink of claim 9. Chen fails to disclose: Wherein at least one heat conducting member is disposed between the circuit board and the heat sinks. However, Chou discloses: Wherein at least one heat conducting member (Fig.1, #33, thermal grease) is disposed between the circuit board (Fig.1, #50) and the heat sinks (Fig.1, #1, see paragraph [0016], as such the office notes that with the combination of Chen in view of Chou, the circuit board having a plurality of components having a heatsink (as taught by Chen) would be modified to include a heat conductive member between the two elements (as taught by Chou) to help better dissipate heat generated by said components). Therefore, it would of have been obvious to one of ordinary skill in the art at the time the application was filed to have modified the circuit board having a plurality of components having a heatsink (as taught by Chen) to include a heat conductive member between the two elements (as taught by Chou) to help better dissipate heat generated by said components. By including a heat conducting member between the two elements, would reduce any thermal gaps between, thereby resulting in better heat dissipation (Chou, paragraph [0016]). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Lee (U.S 2003/0141040 A1) – Discloses a circuit board having a component and a heat sink placed on top of said circuit board to dissipate heat generated via said component. Any inquiry concerning this communication or earlier communications from the examiner should be directed to MANDEEP S BUTTAR whose telephone number is (571)272-4768. The examiner can normally be reached 7:00AM-4:00PM. 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, Jayprakash Gandhi can be reached at 571-272-3740. 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. /MANDEEP S BUTTAR/Primary Examiner, Art Unit 2841
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Prosecution Timeline

Sep 11, 2024
Application Filed
Sep 09, 2026
Non-Final Rejection mailed — §102, §103, §112 (current)

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Prosecution Projections

1-2
Expected OA Rounds
80%
Grant Probability
96%
With Interview (+16.0%)
2y 1m (~0m remaining)
Median Time to Grant
Low
PTA Risk
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