Prosecution Insights
Last updated: April 19, 2026
Application No. 18/565,127

DIFFUSER

Non-Final OA §102§103§112
Filed
Nov 29, 2023
Examiner
SPAMER, DONALD R
Art Unit
1799
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Miro Co. Ltd.
OA Round
1 (Non-Final)
60%
Grant Probability
Moderate
1-2
OA Rounds
2y 11m
To Grant
91%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allow Rate
327 granted / 548 resolved
-5.3% vs TC avg
Strong +31% interview lift
Without
With
+31.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
37 currently pending
Career history
585
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
48.8%
+8.8% vs TC avg
§102
14.1%
-25.9% vs TC avg
§112
29.3%
-10.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 548 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 . 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. Claims 4-10 are 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. With regards to claim 4, “the second portion” in the second to last line lacks antecedent basis. Dependent claims are rejected for the same reasons as the claims from which they depend. 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. Claim(s) 1-5 and 7 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Yoshikawa et al. (JP2019/30030)(English machine translation). With regards to claim 1, Yoshikawa et al. teaches a diffuser (X) comprising a body forming an exterior (decorative cover 8); a base (formed by first case 5, second case 6, and fan case 7) inserted and fixed into the body (as shown in fig 1 and 2) and having a through portion formed on one surface thereof (a flow path shown by XA and XB; fig 1 and 2); and an aroma container coupled to the base (aroma tank 1), wherein the base includes a cover (valve 4) rotatably provided on the through portion, and an internal space of the body (inside between the tank 1 and the valve 4) and an internal space of the base (inside; through the blow out port 3) are selectively communicated with each other as the cover is rotated (the function of the valve) (abstract; fig 1 and 2; see whole document). With regards to claim 2, the base further comprises a coupling portion (cap portion 52 and shaft holding portion 53; where the base part 5 connects with the tank 1; fig 1, 2, 8; para [0022]), the coupling portion is formed at a position facing the through portion (faces the flow path), and the aroma container is coupled to the base through the coupling portion. With regards to claim 3, Yoshikawa et al. teaches a fan module (fan 2 in fan case 7) coupled to a position corresponding to at least a portion of a first portion of the through portion on one surface of the base to form flow of air (right side portion at XA)(fig 1 and 2). With regards to claim 4, the diffuser further has a flow path member (side wall narrowed potion 56 and/ or tubular portion 62, blowout passage portion 63) provided inside the body to guide the flow of air formed by the fan module, wherein the flow path member is provided at a position in communication with the second portion of the (left side at XB) of the through portion on one surface of the base (para [0023]; [0026]-[0027]; fig 1 and 2). With regards to claim 5, the cover includes a first cover (42), a second cover (43), and a rotating shaft (41), the first cover is provided at a position to the second portion or a remaining portion of the second portion and the first portion (as part of the device it corresponds in some way), and the rotating the rotating shaft is between the first cover and the second cover (fig 1 and 2; para [0021]). With regards to claim 7, a weight of the first cover (42) is less than a weight of the second cover (43) (to allow the autoclose when no air flow is occurring; para [0023]; fig 1 and 2). 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) 6 and 9 is/are rejected under 35 U.S.C. 103 as being unpatentable over Yoshikawa et al. (JP2019/30030)(English machine translation). With regards to claim 6, Yoshikawa et al. does not address the area covered by the first and second covers. A person having ordinary skill in the art would have found it obvious to have sized the flow paths and thus the covers as desired in order to get the desired flow volume, rate, and other flow characteristics as desired. With regards to claim 9, Yoshigawa et al. teaches a protrusion (rib not shown) provided at an appropriate location to restrict the opening direction and angle range of the open valve (para [0021]). Yoshigawa et al. does not specify that the protrusion is on the second cover. A protrusion on either an inner wall of the flow path member (56) or on the second cover (43) would restrict the opening angle range. A person having ordinary skill in the art would have found it obvious to have placed the protrusion (rib) in either location motivated by an expectation of limiting the open angle range as desired. Claim(s) 8 is/are rejected under 35 U.S.C. 103 as being unpatentable over Yoshikawa et al. (JP2019/30030)(English machine translation) as applied to claim 5 and further in view of Verdelet (US 4,601,459). With regards to claim 8, Yoshigawa et al. does not teach the claimed structure of the second cover and a rotation preventing portion. Verdelet teaches an improved valve that includes a rabbet (peripheral groove) on the edge of the cover that mates with a stop (valve seat 6) to form a valve seal in a rotating valve (column 8, lines 7-26 and 43-45; fig 4 and 5). A person having ordinary skill in the art would have found it obvious to have used a step (peripheral rabbet) and a rotation preventing portion contacting the step (directly or indirectly via seals) to limit rotation motivated by an expectation of successfully allowing a rotational or butterfly valve to properly seat and seal. Claim(s) 10 is/are rejected under 35 U.S.C. 103 as being unpatentable over Yoshikawa et al. (JP2019/30030)(English machine translation) as applied to claim 4 and further in view of Hanai et al. (WO 2019/038949). With regards to claim 10, Yoshikawa et al. teaches that the body further includes a discharge port (air outlet 3 and cylindrical potion 62; para [0026; fig 1 and 2) connecting the outside of the body and the flow path member through one surface of the body. Yoshigawa et al. does not teach an opening and closing member as claimed. Hanai et al. teaches an airflow vapor addition device (humidifier) and teaches that the flow path can be opened and closed by means of a front louver (7) installed in a front outlet (3) and a rear louver (8) installed in a rear outlet (4) (see paragraphs [0024]-[0026], and figure 5). A person having ordinary skill in the art would have found it obvious to have added louvers in order to control the airflow. The combination results in an opening and closing member as claimed. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to DONALD R SPAMER whose telephone number is (571)272-3197. The examiner can normally be reached Monday to Friday from 9-5. 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, Michael Marcheschi can be reached at (571)272-1374. 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. /DONALD R SPAMER/Primary Examiner, Art Unit 1799
Read full office action

Prosecution Timeline

Nov 29, 2023
Application Filed
Feb 03, 2026
Non-Final Rejection — §102, §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12582731
METHOD TO DECONTAMINATE SOLID SURFACE
2y 5m to grant Granted Mar 24, 2026
Patent 12576177
DEVICE AND METHOD FOR EVAPORATING VOLATILE SUBSTANCES, ESPECIALLY PERFUMES AND/OR INSECTICIDES, AND HEATING BODY
2y 5m to grant Granted Mar 17, 2026
Patent 12575509
MOVABLE APPARATUS WITH AUTOMATIC/AUTONOMOUS OPERATION SLIDABLE ALONG PRE-ESTABLISHED PATHS AMONG ROWS OF VINEYARDS, FOR THE ANTI-BACTERIAL AND FUNGICIDE TREATMENT OF THE SAME VINEYARDS
2y 5m to grant Granted Mar 17, 2026
Patent 12576179
VIRUS REMOVAL DEVICE
2y 5m to grant Granted Mar 17, 2026
Patent 12557840
Portable Scent Dispensing Ashtray
2y 5m to grant Granted Feb 24, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
60%
Grant Probability
91%
With Interview (+31.2%)
2y 11m
Median Time to Grant
Low
PTA Risk
Based on 548 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month