Prosecution Insights
Last updated: April 19, 2026
Application No. 18/560,089

FLOOR BRUSH ASSEMBLY FOR VACUUM CLEANER, AND VACUUM CLEANER

Non-Final OA §DP
Filed
Nov 09, 2023
Examiner
MARIEN, ANDREW JAMES
Art Unit
3745
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Midea Group Co. Ltd.
OA Round
1 (Non-Final)
79%
Grant Probability
Favorable
1-2
OA Rounds
2y 2m
To Grant
94%
With Interview

Examiner Intelligence

Grants 79% — above average
79%
Career Allow Rate
233 granted / 294 resolved
+9.3% vs TC avg
Strong +15% interview lift
Without
With
+15.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 2m
Avg Prosecution
15 currently pending
Career history
309
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
46.1%
+6.1% vs TC avg
§102
24.3%
-15.7% vs TC avg
§112
24.4%
-15.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 294 resolved cases

Office Action

§DP
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 . Information Disclosure Statement The information disclosure statement (IDS) submitted on 11/9/2023, 12/17/2024, and 6/12/2025 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 1 and 10 provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 1, 8, 10 and 18 of copending Application No. 18560077 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because: Instant Application copending Application No. 18560077 Claim 1: A floor brush assembly for a vacuum cleaner, the floor brush assembly comprising: a roller brush component, the roller brush component comprising a sleeve and a roller brush body rotatably mounted in the sleeve, the roller brush body being provided with bristles; and a driving mechanism, a first driving member, a second driving member, the driving wheel is connected to the first driving member through a transmission shaft to drive the roller brush body to rotate; the first driving member and the second driving member are eccentrically arranged to allow the bristles to be selectively extended out of or retracted into the sleeve. the driving mechanism comprising a power source and a transmission component, the transmission component comprising and a driving wheel connected to the power source, wherein: the driving wheel is connected to the second driving member through a linkage structure to drive the sleeve to rotate; and Claim 1: A floor brush assembly for a vacuum cleaner, the floor brush assembly comprising: a roller brush component, the roller brush component comprising a sleeve and a roller brush body rotatably mounted in the sleeve, the roller brush body being provided with bristles arranged in an elongated shape to form a bristle portion, the sleeve having an avoidance opening of an elongated shape, and the bristle portion and the avoidance opening being arranged to directly face towards each other in a radial direction of the roller brush body; a driving mechanism, the driving mechanism comprising a first driving member and a second driving member, the first driving member being configured to drive the roller brush body to rotate, the second driving member being configured to drive the sleeve to rotate, and Claim 8: the driving wheel being connected to the first driving member through the transmission shaft Claim 1: the first driving member and the second driving member being eccentrically arranged to allow the bristle portion to be selectively extended or retracted through the avoidance opening. Claim 8: wherein the driving mechanism further comprises a power source, a driving wheel connected to the power source, a transmission shaft, and a linkage structure, the driving wheel being connected to the first driving member through the transmission shaft and connected to the second driving member through the linkage structure. Claim 10: A vacuum cleaner, comprising: a floor brush assembly, comprising: a roller brush component, the roller brush component comprising a sleeve and a roller brush body rotatably mounted in the sleeve, the roller brush body being provided with bristles; and a driving mechanism, a first driving member, a second driving member, the driving wheel is connected to the first driving member through a transmission shaft to drive the roller brush body to rotate; the first driving member and the second driving member are eccentrically arranged to allow the bristles to be selectively extended out of or retracted into the sleeve. the driving mechanism comprising a power source and a transmission component, the transmission component comprising and a driving wheel connected to the power source, wherein: the driving wheel is connected to the second driving member through a linkage structure to drive the sleeve to rotate; and Claim 10: A vacuum cleaner, comprising: a floor brush assembly comprising: a roller brush component, the roller brush component comprising a sleeve and a roller brush body rotatably mounted in the sleeve, the roller brush body being provided with bristles arranged in an elongated shape to form a bristle portion, the sleeve having an avoidance opening of an elongated shape, and the bristle portion and the avoidance opening being arranged to directly face towards each other in a radial direction of the roller brush body; and a driving mechanism, the driving mechanism comprising a first driving member and a second driving member, the first driving member being configured to drive the roller brush body to rotate, the second driving member being configured to drive the sleeve to rotate, and Claim 8: the driving wheel being connected to the first driving member through the transmission shaft Claim 1: the first driving member and the second driving member being eccentrically arranged to allow the bristle portion to be selectively extended or retracted through the avoidance opening. Claim 8: wherein the driving mechanism further comprises a power source, a driving wheel connected to the power source, a transmission shaft, and a linkage structure, the driving wheel being connected to the first driving member through the transmission shaft and connected to the second driving member through the linkage structure. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Allowable Subject Matter Claims 2-9 and 11-28 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. Claim 1 recites “wherein: the driving wheel is connected to the first driving member through a transmission shaft to drive the roller brush body to rotate; the driving wheel is connected to the second driving member through a linkage structure to drive the sleeve to rotate” and is considered allowable subject matter. The closest prior art of Xu et al. US 20230051802 discloses: A floor brush assembly for a vacuum cleaner (Fig 22: 100), the floor brush assembly comprising: a roller brush component (Fig 24: 1), the roller brush component comprising a sleeve (13) and a roller brush body (11) rotatably mounted in the sleeve (11 within 13), the roller brush body being provided with bristles (11); and a driving mechanism (18, 181, 20, 21,22, 19, 23), the driving mechanism comprising a power source (18 which needs power to run) and a transmission component (181, 20, 21,22, 19, 23), the transmission component comprising a first driving member (21), a second driving member (19), and a driving wheel (181) connected to the power source (18 which needs power to run), the first driving member (21 causes brush body 11 to rotated) and the second driving member (19 causes sleeve 13 to rotate) are eccentrically arranged to allow the bristles to be selectively extended out of or retracted into the sleeve (Par 125: the bristle is adapted to be extended out of and retracted into the scraping sleeve hole in the radial direction of the scraping sleeve during a rotation of the roller brush body and the scraping sleeve). Xu is silent as to “wherein: the driving wheel is connected to the first driving member through a transmission shaft to drive the roller brush body to rotate; the driving wheel is connected to the second driving member through a linkage structure to drive the sleeve to rotate” This prior art discloses the driving wheel being connected to the first driving member and second driving member through belts and not shafts and linkages. There is not prior art found in the search which teaches or would reasonably be obvious to modify into a vacuum that teaches these limitations. Claim 10 distinguishes itself in the same manner as in claim 1. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Nguyen et al. US 20210186291 discloses a sleeve and body brush assembly similar to applicants. Peng et al. US 20200245831 discloses the gear assembly for rotating the brush assembly. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Andrew J Marien whose telephone number is (469)295-9159. The examiner can normally be reached 9:00 am- 6:00 pm CST, Monday through Friday. 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, Courtney Heinle can be reached at (571) 270-3508. 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. /Andrew J Marien/Primary Examiner, Art Unit 3745
Read full office action

Prosecution Timeline

Nov 09, 2023
Application Filed
Jan 15, 2026
Non-Final Rejection — §DP (current)

Precedent Cases

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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
79%
Grant Probability
94%
With Interview (+15.2%)
2y 2m
Median Time to Grant
Low
PTA Risk
Based on 294 resolved cases by this examiner. Grant probability derived from career allow rate.

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