Prosecution Insights
Last updated: April 19, 2026
Application No. 18/546,223

MICROFLUIDIC CASSETTE

Non-Final OA §103
Filed
Aug 11, 2023
Examiner
KRCHA, MATTHEW D
Art Unit
1796
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Quantumdx Group Limited
OA Round
1 (Non-Final)
66%
Grant Probability
Favorable
1-2
OA Rounds
3y 3m
To Grant
99%
With Interview

Examiner Intelligence

Grants 66% — above average
66%
Career Allow Rate
358 granted / 544 resolved
+0.8% vs TC avg
Strong +36% interview lift
Without
With
+35.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 3m
Avg Prosecution
71 currently pending
Career history
615
Total Applications
across all art units

Statute-Specific Performance

§101
1.6%
-38.4% vs TC avg
§103
47.8%
+7.8% vs TC avg
§102
21.9%
-18.1% vs TC avg
§112
22.9%
-17.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 544 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 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. 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. Claim(s) 1-14 is/are rejected under 35 U.S.C. 103 as being unpatentable over United States Application Publication No. 2015/0136604, hereinafter Nielsen in view of United States Application Publication No. 2014/0255275, hereinafter Barry. Regarding claim 1, Nielsen teaches a microfluidic cassette (item 3100) comprising: a microfluidic cassette body (figures 31 and 32), the microfluidic cassette body comprising: a fluid flow channel (item 3109); a first piercing member (one of item 3111a) comprising a wall extending out from the microfluidic cassette body (figure 9), the wall enclosing a first fluid aperture (figure 9, opening) that is in fluid communication with the fluid flow channel (figure 32); and a second piercing member (another one of item 3111a) comprising a wall extending out from the microfluidic cassette body (figure 9) and adjacent to the first piercing member (figure 32), the wall enclosing a second fluid aperture (figure 9, opening) that is in fluid communication with the fluid flow channel (figure 32). Nielsen fails to teach the first piercing member comprises a further fluid aperture located on a portion of the wall of the first piercing member facing away from the second piercing member. Barry teaches a liquid packaging system which has a puncturing element which has a fluid aperture located on a portion of the wall of the first piercing member (Barry, paragraph [0084] and figure 7A, the single split) to make the increase the sharpness of the piercing member (Barry, paragraph [0084]). It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to have added a further fluid aperture located on the wall of each of the piercing members which face away from each other because it would increase the sharpness of the piercing member (Barry, paragraph [0084]). Regarding claim 2, modified Nielsen teaches the further fluid aperture is a slot in the wall of the first piercing member (Barry, figure 7A). Regarding claim 3, modified Nielsen teaches the slot extends through the wall in a direction from a distal end of the wall towards a proximal end of the wall (Barry, figure 7A). Regarding claim 4, modified Nielsen teaches the slot is substantially V-shaped and decreases in width in a direction from the distal end of the wall towards the proximal end of the wall (Barry, figure 7A). Regarding claim 5, modified Nielsen teaches the further fluid aperture is located on the wall at or close to a portion of the wall that extends furthest from the microfluidic cassette body (Barry, figure 7A). Regarding claim 6, Nielsen teaches wherein one or both of the wall of the first piercing member and the wall of the second piercing member are substantially annular (figure 9). Regarding claim 7, Nielsen teaches one or both of a distal end of the wall of the first piercing member and a distal end of the wall of the second piercing member are substantially sloped (figure 9). Regarding claim 8, Nielsen teaches an insert comprising a reagent-containing chamber (items 3102-2105), wherein the reagent-containing chamber comprises a seal (item 3113) pierceable by the first and second piercing members (paragraph [0138]). Regarding claim 9, Nielsen teaches the insert is secured within the microfluidic cassette body (paragraph [0137]) and is movable from a first position within the microfluidic cassette body where the seal of the reagent-containing chamber is not in contact with the first and second piercing members to a second position within the microfluidic cassette body where the seal is in contact with the first and second piercing members (paragraph [0137]). Regarding claim 10, Nielsen teaches he microfluidic cassette body further comprises an outer wall (item 3107) enclosing the first and second piercing members (figure 32), the outer wall shaped to guide movement of the insert between the first position and the second position (paragraph [0136]). Regarding claim 11, Nielsen teaches a cover element (item 3112) arranged to provide a sealed chamber enclosing the first and second piercing members and the insert (paragraph [0138]). Regarding claim 12, Nielsen teaches the insert is secured to an inner surface of the cover element (figure 32). Regarding claim 13, Nielsen teaches wherein the second piercing member comprises a further fluid aperture located on a portion of the wall of the second piercing member facing away from the first piercing member (see supra). Regarding claim 14, Nielsen teaches a microfluidic diagnostic system (abstract) comprising: a microfluidic cassette according claim 1 (see supra); and a microfluidic diagnostic device (item 100) adapted to receive the microfluidic cassette (figure 1-3), the microfluidic diagnostic device comprising one or more actuators (paragraph [0102], cam driven clamping system) adapted to break a seal of a reagent-containing chamber of an insert of the microfluidic cassette (paragraph [0102]). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MATTHEW D KRCHA whose telephone number is (571)270-0386. The examiner can normally be reached M-Th 7am-5pm. 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, Elizabeth Robinson can be reached at (571)272-7129. 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. /MATTHEW D KRCHA/Primary Examiner, Art Unit 1796
Read full office action

Prosecution Timeline

Aug 11, 2023
Application Filed
Jan 29, 2026
Non-Final Rejection — §103 (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
66%
Grant Probability
99%
With Interview (+35.6%)
3y 3m
Median Time to Grant
Low
PTA Risk
Based on 544 resolved cases by this examiner. Grant probability derived from career allow rate.

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