Prosecution Insights
Last updated: May 29, 2026
Application No. 18/640,132

HEAT DISSIPATION FAN WITH EXPANDABILITY

Non-Final OA §103
Filed
Apr 19, 2024
Examiner
FENG, ZHENGFU J
Art Unit
2835
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Dongguan Kimtech Electronics Co. Ltd.
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
5m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
380 granted / 503 resolved
+7.5% vs TC avg
Strong +39% interview lift
Without
With
+38.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
22 currently pending
Career history
515
Total Applications
across all art units

Statute-Specific Performance

§103
91.0%
+51.0% vs TC avg
§102
7.3%
-32.7% vs TC avg
§112
1.4%
-38.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 503 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 1 are rejected under 35 U.S.C. 103 as being unpatentable over Ou (US 10,736,232) in view of Huang (US 2012/0155013)Re claim 1: Ou discloses A heat dissipation fan (10 in fig. 1) with expandability comprising: a frame (11 in fig. 1); a driving unit (12 in fig. 1) provided on the frame; a fan blade (fan blades in fig. 1) driven by the driving unit to rotate relative to the frame (the motor is controlled by the driving unit in fig. 2); a plurality of connectors (14, 15 in fig. 1) exposed on multiple sides of the frame; and a multiplex management unit (17 and 18 in fig. 2) provided on the frame and electrically connected to the plurality of connectors and the driving unit (fig. 2), the multiplex management unit enabling each of the plurality of connectors to implement as a first role and a second role simultaneously , the first role being either a power inputter or a power outputter (17 controls power in fig. 2), the second role being either a signal inputter or a signal outputter (18 controls signals in fig. 2); wherein each of the plurality of connectors is capable of being connected to an expansion device (fig. 3), the heat dissipation fan can be in either a series configuration (fig. 3) or a tree-like configuration, and the heat dissipation fan and at least one expansion device are independently controlled (fig. 5 shows independent control). Ou does not explicitly disclose wherein the connectors are universal serial buses. Huang discloses wherein the connector is a universal serial bus (4 in fig. 2). Thus it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the heat dissipation fan of Ou wherein the connector is a universal serial bus as taught by Huang, in order to have compatibility with many other electronic devices.Re claim 2: Ou discloses wherein the frame comprises four side walls (fig. 1), and at least two of the four side walls are respectively provided with at least one of the plurality of connectors (fig. 1). Ou does not explicitly disclose wherein the connectors are universal serial buses. Huang discloses wherein the connector is a universal serial bus (4 in fig. 2).Re claim 3: Ou discloses wherein the driving unit comprises a circuit board (121 in fig. 6; col. 5, lines 38-43) provided on the frame (fig. 6), a control circuit (122 in fig. 2) provided on the circuit board, and a motor (123 in fig. 2) connected to the control circuit, the control circuit is electrically connected to the multiplex management unit (fig. 2). Re claim 4: Ou discloses wherein the heat dissipation fan comprises a visual display unit provided on the frame (col. 6), and the visual display unit is connected to the driving unit (col. 6). Re claim 5: Ou discloses wherein the driving unit comprises a thermal sensor (col. 5) connected to the control circuit.Re claim 6: Ou does not explicitly disclose wherein the driving unit comprises a device address. However, it would obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the heat dissipation fan of Ou wherein the driving unit comprises a device address so it functions properly as part of a smart fan, since applicant has not disclosed that this change solves any stated problem or is for any particular purpose and it appears that the invention would perform equally well with this change. Re claim 7: Ou does not explicitly disclose wherein the multiplex management unit is a USB hub module. Huang discloses wherein the multiplex management unit is a USB hub module (para. 0010). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure: US 7,038,909 – is considered pertinent because this reference describes a contractible and extentable laptop computer external cooler pad. Any inquiry concerning this communication or earlier communications from the examiner should be directed to ZHENGFU J FENG whose telephone number is (571)272-2949. The examiner can normally be reached on Monday - Friday, 900am-530pm EST. 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 on (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. /ZHENGFU J FENG/ Primary Examiner, Art Unit 2835 February 21, 2026
Read full office action

Prosecution Timeline

Apr 19, 2024
Application Filed
Mar 06, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12615708
SWITCHING POWER CONVERTER MODULE WITH A HEAT DISSIPATION STRUCTURE
2y 7m to grant Granted Apr 28, 2026
Patent 12610491
SYSTEMS AND METHODS FOR MOUNTING INFORMATION HANDLING SYSTEMS TO SERVER RACKS USING A SPACER
2y 9m to grant Granted Apr 21, 2026
Patent 12610819
INTEGRATED COOLING ASSEMBLIES FOR ADVANCED DEVICE PACKAGING AND METHODS OF MANUFACTURING THE SAME
2y 4m to grant Granted Apr 21, 2026
Patent 12604432
MODULAR ENCLOSURES FOR COMPONENT COOLING
2y 11m to grant Granted Apr 14, 2026
Patent 12604437
COMPACT MODULAR HYBRID HEAT EXCHANGER (CMH2X)
2y 7m to grant Granted Apr 14, 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
76%
Grant Probability
99%
With Interview (+38.7%)
2y 7m (~5m remaining)
Median Time to Grant
Low
PTA Risk
Based on 503 resolved cases by this examiner. Grant probability derived from career allowance rate.

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