Prosecution Insights
Last updated: July 31, 2026
Application No. 18/661,137

FLOW CELL FOR ELECTROPHORETIC MOBILITY MEASUREMENT

Non-Final OA §102§112
Filed
May 10, 2024
Priority
May 12, 2023 — provisional 63/466,243
Examiner
SUN, CAITLYN MINGYUN
Art Unit
1795
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Wyatt Technology LLC
OA Round
1 (Non-Final)
64%
Grant Probability
Moderate
1-2
OA Rounds
9m
Est. Remaining
75%
With Interview

Examiner Intelligence

Grants 64% of resolved cases
64%
Career Allowance Rate
198 granted / 312 resolved
-1.5% vs TC avg
Moderate +11% lift
Without
With
+11.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
56 currently pending
Career history
381
Total Applications
across all art units

Statute-Specific Performance

§101
1.2%
-38.8% vs TC avg
§103
85.8%
+45.8% vs TC avg
§102
4.2%
-35.8% vs TC avg
§112
6.1%
-33.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 312 resolved cases

Office Action

§102 §112
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 . Drawings The drawings are objected to as failing to comply with 37 CFR 1.84(p)(5) because they include the following reference character(s) not mentioned in the description: reference characters 301 and 302 in Fig. 3D and 3E. Corrected drawing sheets in compliance with 37 CFR 1.121(d), or amendment to the specification to add the reference character(s) in the description in compliance with 37 CFR 1.121(b) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. 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. Claim(s) 9 and 13 is/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 pre-AIA the applicant regards as the invention. Claim 9 recites the limitation "the top structure" in line 2. There is insufficient antecedent basis for this limitation in the claim. It is suggested to be “a top structure.” Claim 13 recites the limitation "the bottom structure" in lines 1-2. There is insufficient antecedent basis for this limitation in the claim. It is suggested to be “a bottom structure.” Claim Rejections - 35 USC § 102 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 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 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) 10-13 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Sun (CN 216484765, machine translation used for citation). Regarding claim 10, Sun teaches a flow cell (Fig. 1-6, 9; para. 1: a tapered capillary electrode sample cell) comprising: a set of luer fitting receptables (Fig. 2: as annotated) to connected to a first set of luer fittings (Fig. 2; p. 4, para. 3: luer outer locking connector 3); optical windows (Fig. 3; p. 4, para. 3: detection point 9); and indexing surfaces (Fig. 9: the outer surfaces of the flow cell for hand holding) to index on an external electrophoretic mobility measurement instrument (this limitation is functional limitation in apparatus claims. MPEP 2114 (II). It does not differentiate the claimed apparatus from a prior art apparatus because the prior art apparatus teaches all the structural limitations of the claim. Ex parte Masham, 2 USPQ2d 1647 (Bd. Pat. App. & Inter. 1987)). PNG media_image1.png 684 530 media_image1.png Greyscale Regarding claim 11, Sun teaches wherein the flow cell comprises at least one leak channel (Fig. 2; p. 4, para. 3: groove 4) to divert leaked fluid to waste (this limitation is functional limitation in apparatus claims. MPEP 2114 (II). It does not differentiate the claimed apparatus from a prior art apparatus because the prior art apparatus teaches all the structural limitations of the claim. Ex parte Masham, 2 USPQ2d 1647 (Bd. Pat. App. & Inter. 1987)). Regarding claim 12, Sun teaches wherein a total channel length of the flow cell (Fig. 3: the total length of sample channel 2) and a cross-sectional area of the flow cell (Fig. 3: the sample cell must have a cross-sectional area) are chosen to minimize convection, joule heating, and sample volume (this limitation is functional limitation in apparatus claims. MPEP 2114 (II). It does not differentiate the claimed apparatus from a prior art apparatus because the prior art apparatus teaches all the structural limitations of the claim. Ex parte Masham, 2 USPQ2d 1647 (Bd. Pat. App. & Inter. 1987)). Regarding claim 13, Sun teaches wherein the optical windows (Fig. 3: detection point 9 at the bottom structure 8 of the cone) are recessed into the bottom structure (Fig. 9: as annotated, the detection point at the bottom is recessed from the indexing surfaces for hand holding) to prevent the windows from being mistakenly touched (this limitation is functional limitation in apparatus claims. MPEP 2114 (II). It does not differentiate the claimed apparatus from a prior art apparatus because the prior art apparatus teaches all the structural limitations of the claim. Ex parte Masham, 2 USPQ2d 1647 (Bd. Pat. App. & Inter. 1987)). PNG media_image2.png 844 444 media_image2.png Greyscale Allowable Subject Matter Claim(s) 1-8 is/are allowed, and claim 9 would be allowable if rewritten to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action and to include all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: The prior art does not disclose nor render obvious all of the cumulative limitations of claims 1-9 with particular attention to the limitations: wherein the channels comprise flow-through cylindrical electrodes (claim 1 and 7). Here, the pertinent art, Weber (US 2019/0022646), teaches a flow cell ([Abstract]: a microfluidic flow cell) comprising a series of input/output ports 7 (Fig. 1; ¶38). Plugs 10 are inserted into the passages 8 in a fluid-tight manner (Fig. 1-2; ¶38). The plug 10 having a conical sealing face 17 that forms a press fit (Fig. 3(b)), and the slope of the sealing face 17 corresponds to the Luer standard (6% slope) (¶42). Thus, Weber teaches a first set of luer fittings (Fig. 1; ¶38: plug 10); channels (e.g., Fig. 7(a); ¶47: channel 26) coupled to the first set of luer fittings, wherein the channels comprise electrodes (Fig. 3(b); ¶40: electrode 16, 16’); electrical connectors (Fig. 3(b); ¶40: conductor pieces 15, 15’) connected to the electrodes (Fig. 3(b)) to connect to at least one external circuit (Fig. 1(c): terminal contact for connecting element 11; ¶40: the designation 11 points to electric contact elements of an operating device). The pertinent art, Hayashizaki (US 6,383,356), teaches a flow cell (Fig. 1, 4: passages 7a, 7b, 7c inside the pump block 5, 47) comprising: a first set of luer fittings (Fig. 1, 4; col. 3, ll. 53-54, 57: luer-lok joints 11, 17); channels (Fig. 1, 4: passages 7a, 7b, 7c) coupled to the first set of luer fittings, wherein the channels comprise electrodes (e.g., Fig. 4; col. 6, l. 11: electrode 53 in the passage 7c); and a second set of luer fitting to attach to the channels (e.g., Fig. 1, 4; col. 3, l. 48, 55: capillary joint 3 and switchable drain joint 15) and to external fluid connectors (e.g., Fig. 1, 4: the end 1a of the capillary 1). The pertinent art, Ikegami (US 2014/0027286), teaches a flow cell (Fig. 1; ¶38: internal chamber 11 in the interior of the sample cell container C) comprising: a first set of fittings (Fig. 5B; ¶72: caps 22, 21) that can be firmly coupled with the injection portions 17 and extraction portion 18 using threaded fittings (Fig. 1, 8, ¶82), channels (Fig. 5; ¶68: internal space 11) coupled to the first set of fittings (Fig. 5B), wherein the channels comprise electrodes (Fig. 5B: 14; Fig. 9: 14a; ¶68: a pair of embedded electrodes 14). None of these references teaches flow-through cylindrical electrodes inside the channels, shown as electrodes 130 (Fig. 2B: electrodes 130A and 130B along the channels 104A and 104B) in the instant application. Therefore, the cited references neither disclose nor render obvious all of the cumulative limitations of claims 1-9, particular to the limitation “flow-through cylindrical electrodes” in combination with other limitations. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CAITLYN M SUN whose telephone number is (571)272-6788. The examiner can normally be reached M-F: 8:30am - 5:30pm. 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, Luan Van can be reached on 571-272-8521. 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. /C. SUN/Primary Examiner, Art Unit 1795
Read full office action

Prosecution Timeline

May 10, 2024
Application Filed
Apr 28, 2026
Non-Final Rejection mailed — §102, §112 (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

1-2
Expected OA Rounds
64%
Grant Probability
75%
With Interview (+11.1%)
3y 0m (~9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 312 resolved cases by this examiner. Grant probability derived from career allowance rate.

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