Prosecution Insights
Last updated: April 19, 2026
Application No. 17/572,168

GAS EVACUATION DEVICE

Final Rejection §102§103
Filed
Jan 10, 2022
Examiner
SEIFU, LESSANEWORK T
Art Unit
1774
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Microjet Technology Co. Ltd.
OA Round
4 (Final)
79%
Grant Probability
Favorable
5-6
OA Rounds
2y 5m
To Grant
79%
With Interview

Examiner Intelligence

Grants 79% — above average
79%
Career Allow Rate
832 granted / 1049 resolved
+14.3% vs TC avg
Minimal +0% lift
Without
With
+0.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
35 currently pending
Career history
1084
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
36.0%
-4.0% vs TC avg
§102
27.4%
-12.6% vs TC avg
§112
29.0%
-11.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1049 resolved cases

Office Action

§102 §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 § 102 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, 2, 4, and 15-17 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Mou et al. (US 2019/0056125). Regarding claim 1, Regarding claim 1, the reference Mou et al. discloses a gas evacuation device (100) for filtering a gas, comprising: a housing (101); a gas channel located in the housing and comprising a gas-channel inlet (1011) and a gas-channel outlet (1012), wherein the gas-channel inlet (1011) and the gas-channel outlet (1012) are formed on the housing (see paras. [0017]-[0019]; [0024]; Figs. 1-2); a gas detection main body (12) disposed in the gas channel adjacent to the gas-channel inlet for detecting the gas introduced through the gas-channel inlet (1011) and generating detection data; a gas guider (13) disposed adjacent to the gas-channel outlet for guiding and transporting the gas from the gas-channel inlet to the gas-channel outlet (see paras. [0017]-[0019]; [0024]; Figs. 1-2); and a driving controller (11) disposed in the gas channel adjacent to the gas guider for controlling enablement and disablement of the gas detection main body and the gas guider (see paras. [0017]-[0019]; [0024]; Figs. 1-2), wherein the housing (101) of the gas evacuation device is connected with a space boundary on at least one outer surface thereof (i.e., a space boundary defined by the outer surface of the housing element 101, see Fig. 1), the gas-channel inlet (1011) and the gas-channel outlet (1012) are respectively located in a first space and a second space, and the first space and the second space are separated by the space boundary (i.e., the space boundary defined by the outer surface of the housing element 101) (see para. [0017]; Fig. 1). Regarding claim 2, the reference Mou et al. discloses that the gas evacuation device (100) further comprises a purification unit (2) disposed in the gas channel for filtering the gas passing through the gas channel (see para. [0017]; Fig. 1). Regarding claim 4, the reference Mou et al. discloses the gas evacuation device, wherein the purification unit (2) is a high efficiency particulate air filter screen (see para. [0023]; Fig. 1). Regarding claim 15, as no structural distinction is seen between the purification unit (2) of Mou et al. and the purification unit of the instantly claimed device, the purification unit (2) of Mou et al. is considered capable of performing the function recited in claim 15. Regarding claim 16, the reference Mou et al. discloses the gas evacuation device, wherein the driving controller further comprises: at least one wireless multiplexing communication module (14) including a Wi-Fi module, a Bluetooth module, a radio frequency identification module, or a near field communication module (see paras. [0022]; [0024]-[0025]; Fig. 2); a processing and computing system (11) for processing and computing the detection data received by the wireless multiplexing communication module, so as to automatically adjust the setting values of an exported airflow rate of the gas guider (see paras. [0024]-[0025]; Fig. 2); a wired control module for providing control signals to the purification unit, the gas guider and the gas detection main body (see paras. [0024]-[0025]; Fig. 2); and an external transmission module (14) for executing a communication transmission with an external device via the wireless multiplexing communication module(see para. [0026]; Fig. 2). Thus, the driving controller of Mou et al. is considered capable of performing all the functions recited in claim 16. Regarding claim 17, the reference Mou et al. discloses the gas evacuation device, wherein the detection data is one selected from the group consisting of PM1, PM2.5, PM10, carbon monoxide, carbon dioxide, ozone, sulfur dioxide, nitrogen dioxide, lead, total volatile organic compounds, formaldehyde, bacteria, virus, temperature, humidity and a combination thereof (see paras. [0020]-[0021]). 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. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 1, 2, 4, and 15-17 are rejected under 35 U.S.C. 103 as being obvious over Mou et al. (US 2021/0188050), hereinafter, US ‘050. The applied reference has a common applicant with the instant application. Based upon the earlier effectively filed date of the reference, it constitutes prior art under 35 U.S.C. 102(a)(2). Regarding claim 1, the reference US ‘050 discloses a gas evacuation device (1) for filtering a gas, comprising: a housing (1); a gas channel (13) located in the housing (1) and comprising a gas-channel inlet (11) and a gas-channel outlet (12), wherein the gas-channel inlet (11) and the gas-channel outlet are formed on the housing (1) (see para. [0038]; Figs. 2A-E); a gas detection main body (4) disposed in the gas channel (13) for detecting the gas introduced through the gas-channel inlet (11) and generating detection data (see para. [0037; Figs. 2A-E); a gas guider (3) disposed adjacent to the gas-channel outlet (12) for guiding and transporting the gas from the gas-channel inlet (11) to the gas-channel outlet (12); and a driving controller (4c) disposed in the gas channel (13) near the gas guider (3) for controlling enablement and disablement of the gas detection main body and the gas guider (see Abstract; paras. [0007]; [0038]; [0050]; Figs. 2A-E; Fig. 13), wherein the housing (1) of the gas evacuation device (1) is connected with a space boundary on at least one outer surface thereof (i.e., a space boundary defined by an outer surface of the housing 1, as shown in Figs. 2A-E), the gas-channel inlet (11) and the gas-channel outlet (12) are respectively located in a first space and a second space, and the first space and the second space are separated by the space boundary (i.e. the space boundary defined by the outer surface of the housing 1, as shown in Figs. 2A-E) (see para. [0038]; Figs. 2A-E). The reference US ‘050, however, does not specifically specify wherein the gas detection main body (4) is disposed in the gas channel (13) adjacent to the gas-channel inlet (11). However, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to provide the gas detection main body (4) of the reference US ‘050 in the gas channel (13) adjacent to the gas-channel inlet (11) in application where it is desired to detect the quality of ambient air drawn into the gas channel (13) prior to filtering the air, since the reference US ‘050 teaches that the gas detection main body (4) can be disposed in the gas channel (13) to detect gas drawn into the device (1) to obtain gas detection data (see Abstract; paras. [0005]-[0007]). Regarding claim 2, the reference US ‘050 discloses that the gas evacuation device (1) further comprises a purification unit (2) disposed in the gas channel (13) for filtering the gas passing through the gas channel (see Abstract; paras. [0007]; [0039]; Fig. 2A). Regarding claim 4, the reference US ‘050 discloses the gas evacuation device (1), wherein the purification unit (2) is a high efficiency particulate air filter screen (see para. [0039]1). Regarding claim 15, as no structural distinction is seen between the purification unit (2) of US ‘050 and the purification unit of the instantly claimed device, the purification unit (2) of US ‘050. is considered capable of performing the function recited in claim 15. Regarding claim 16, the reference US ‘050 discloses the gas evacuation device (1), wherein the driving controller further comprises: at least one wireless multiplexing communication module (14) including a Wi-Fi module, a Bluetooth module, a radio frequency identification module, or a near field communication module (see paras. [0050]; Fig. 13); a processing and computing system (4c) for processing and computing the detection data received by the wireless multiplexing communication module, so as to automatically adjust the setting values of an exported airflow rate of the gas guider (see para. [0050]; Fig. 13); a wired control module for providing control signals to the purification unit, the gas guider and the gas detection main body (see paras. [0040]-[0044]; Fig. 13); and an external transmission module (4d) for executing a communication transmission with an external device via the wireless multiplexing communication module (see para. [0050]; Fig. 13). Thus, the driving controller of US ‘050 is considered capable of performing all the functions recited in claim 16. Regarding claim 17, the reference US ‘050 discloses the gas evacuation device, wherein the detection data is one selected from the group consisting of PM2.5, carbon monoxide, carbon dioxide, ozone, total volatile organic compounds, formaldehyde, bacteria, virus and a combination thereof (see paras. [0053]; [0064]). Response to Arguments Applicant's arguments filed on 10 December 2025 have been fully considered but they are not persuasive. Applicant argues the features "a gas channel located in the housing and comprising a gas-channel inlet and a gas-channel outlet, wherein the gas-channel inlet and the gas-channel outlet are formed on the housing" and "the housing of the gas evacuation device is connected with a space boundary on at least one outer surface thereof, the gas-channel inlet and the gas-channel outlet are respectively located in a first space and a second space, and the first space and the second space are separated by the space boundary" as recited in the amended claim 1 are not disclosed or taught by the reference Mou et al. (see Remarks, pages 10-12). The examiner respectfully disagrees. The instantly claimed gas evacuation device as defined in amended claim 1 reads on the device 100 described and illustrated in Fig. 1 of the reference Mou et al. For ease of comparison, Figure 1 of the reference Mou et al. is reproduced below with added annotations showing how the device 100 taught by Mou et al. reads on the device recited in amended claim 1. PNG media_image1.png 584 932 media_image1.png Greyscale Thus, as no structural distinction is seen between the instantly claimed device and the device of Mou et al., the device of Mou et al. can suitably be employed for filtering a gas as claimed in claim 1. Applicant also argues the features "a gas channel located in the housing and comprising a gas-channel inlet and a gas-channel outlet, wherein the gas-channel inlet and the gas-channel outlet are formed on the housing" and "the housing of the gas evacuation device is connected with a space boundary on at least one outer surface thereof, the gas-channel inlet and the gas-channel outlet are respectively located in a first space and a second space, and the first space and the second space are separated by the space boundary" as recited in the amended claim 1 are not disclosed or taught by the reference US ‘050 (see Remarks, pages 13-14). The examiner respectfully disagrees. The structural features "a gas channel located in the housing and comprising a gas-channel inlet and a gas-channel outlet, wherein the gas-channel inlet and the gas-channel outlet are formed on the housing" and "the housing of the gas evacuation device is connected with a space boundary on at least one outer surface thereof, the gas-channel inlet and the gas-channel outlet are respectively located in a first space and a second space, and the first space and the second space are separated by the space boundary" recited in the amended claim 1 read on the device illustrated in Figure 2A of the reference US ‘050. For ease of comparison, Figure 2A of the reference US ‘050 is reproduced below with added annotations showing how the device illustrated in Figure 2A reads on the structural features as currently presented in amended claim 1. PNG media_image2.png 631 677 media_image2.png Greyscale Conclusion THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Lessanework T Seifu whose telephone number is (571)270-3153. The examiner can normally be reached M-T 9:00 am - 6:30 pm; F 9:00 am - 1:00 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 at 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 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. /LESSANEWORK SEIFU/Primary Examiner, Art Unit 1774
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Prosecution Timeline

Jan 10, 2022
Application Filed
Feb 11, 2025
Non-Final Rejection — §102, §103
May 08, 2025
Response Filed
Jun 02, 2025
Final Rejection — §102, §103
Aug 27, 2025
Request for Continued Examination
Aug 31, 2025
Response after Non-Final Action
Sep 17, 2025
Non-Final Rejection — §102, §103
Dec 10, 2025
Response Filed
Jan 27, 2026
Final Rejection — §102, §103 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

5-6
Expected OA Rounds
79%
Grant Probability
79%
With Interview (+0.0%)
2y 5m
Median Time to Grant
High
PTA Risk
Based on 1049 resolved cases by this examiner. Grant probability derived from career allow rate.

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