Prosecution Insights
Last updated: October 02, 2026
Application No. 18/188,527

ONE-POT PATHOGEN DETECTION SYSTEM AND METHOD FOR REAL-TIME LATERAL FLOW ASSAY

Non-Final OA §102§103§112
Filed
Mar 23, 2023
Examiner
LI, BAO Q
Art Unit
1671
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
City University of Hong Kong
OA Round
3 (Non-Final)
75%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 75% — above average
75%
Career Allowance Rate
688 granted / 912 resolved
+15.4% vs TC avg
Strong +27% interview lift
Without
With
+26.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
23 currently pending
Career history
933
Total Applications
across all art units

Statute-Specific Performance

§101
3.5%
-36.5% vs TC avg
§103
22.5%
-17.5% vs TC avg
§102
26.6%
-13.4% vs TC avg
§112
26.7%
-13.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 912 resolved cases

Office Action

§102 §103 §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 . RCE The request filed on 08/10/2026 for a request for continued examination (RCE) under 37 CFR 1.114 (d) is acceptable and a RCE has been established. An action on the RCE follows. Response Applicants’ response and claims amendment filed on August 18, 2026 are acknowledged. Claims 1-4 and 19-21 were canceled. Claims 5-13 were amended. Claims 5-18 are pending. Claims 5-12 are withdrawn from consideration. Claims 13-18 are considered. 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 13-15 and 17-18 are still rejected under 35 U.S.C. 102 (a) (1) by June et al. (Analytica Chemical Acta, Volume 853, 1 January 2015, Pages 541-547). In the response, Applicants traverse the rejection and submit that claim 13 has been amended, the prior art should not read on the rejected claims as claim 13 has been amended to wherein two primers of the plurality of primers, except a forward outer primer (F3) and a reverse outer primer (B3) are conjugated at their respective 5'-end with different kinds of tags, such that the two kinds of tags are contained in corresponding amplicons as the identifier which are specifically bound with said antibody in the concurrent immunochromatographic assay; the two different kinds of tags are two different hapten tags selected from any two of various hapten tags comprising biotin, 6-carboxyfluorescein (FAM), fluorescein isothiocyanate (FITC), digoxigenin (DIG), tetramethyl rhodamine (TAMRA), dinitrophenyl and sulforhodamine (Texas Red), wherein the two primers consisting of (i) a forward primer (FIP) or a reverse inner primer (BIP), and (ii). A loop backward (LB) primer. The cited prior art by June do not teach such feature as he disclosed using six primers and not different heptane tags Applicants’ argument has been respectfully considered. However, it is not found persuasive with the following reason: A broad scope of newly amended claim 13 is reasonable interpretation (BRI) as a molecular diagnostic assay on a target pathogen gene in an analyte, comprising multiples primers without any limitation, wherein two of the primers among them are labeled with two different heptane tags except a forward outer primer (F3) and a reverse outer primer (B3) that are not limited to be labeled with two different hapten tags, which can be the same. The two primers can be (i) forward primer (FIP) or a reverse inner primer (BIP), and (ii). A loop backward (LB) primer. The hapten labeling tags are selected from biotin, 6-carboxyfluorescein (FAM), fluorescein isothiocyanate (FITC), digoxigenin (DIG), tetramethyl rhodamine (TAMRA), dinitrophenyl and sulforhodamine (Texas Red). In contrast to Applicants’ assertion, the disclosure by June meets the limitaiton as claim 12 amended. For instance, Fig. 2 teaches three sets of primers including the primers of H1N1; (a) +(d) or H3N2 (b) + (D) or H5 gene (c) +(d), wherein LB primer of H is labeled with Texas Red, and a forward primer (LF) of M protein is labeled with Digoxigenin. Texas Red and Digoxin are two different Hapten tags, which are respectively labeled one in loop backward (LB) primer and other in forward primer (LF). Since BRI of claim 13 is reasonable interpretation as a molecular diagnostic assay on a target pathogen gene in an analyte, comprising multiples primers without any limitation. However, other primers are not limited to the different or same. June e et al. also teach that they used multiple RT-LAMP reaction and colorimetric detection of the RT-LAMP amplicon on ICS. said assay of amplification of target nucleic acid in the reaction mixture directly comprises loop-mediated isothermal amplification (LAMP) reaction. An immunochromatographic strip (ICS) has been widely utilized and commercialized for pathogen diagnostic tools in this document. The packaged ICS in a polystyrene case and the structure of an ICS are illustrated in Fig. 1. The ICS consists of four parts: a buffer loading pad, a conjugate pad, a detection region with test and control lines, and an absorbent pad. Streptavidin and mouse IgG coated gold nanoparticles (AuNPs) were concentrated in the conjugate pad to capture the biotin labeled RT-LAMP products. In the detection region, two test lines and one control line were patterned. The test line 1 and line 2 were coated with Digoxigenin monoclonal antibodies (Medisensor Inc., Korea), and Texas Red monoclonal antibodies (Medisensor Inc., Korea) respectively, and the control line was immobilized with goat anti-mouse IgG. Because it is the PCR and RT-PCT , the assay also disclosed inherently comprises a thermocycler, water bath or heat block. Moreover, it also teaches a lateral flow strip as a , which is considered as a lateral flow device. Therefore, the cited reference still meets the limitation of claims, rejection is maintained. Fig. 2. PNG media_image1.png 608 714 media_image1.png Greyscale Claim Rejections - 35 USC § 103 Primer design for multiplex RT-LAMP. (a) H1 gene of influenza A H1N1. (b) H3 gene of H3N2. (c) H5 gene of H5N1. LF and LB loop primers for targeting HA genes were labeled with Texas Red haptens. (d) Primer design for targeting conserved M gene of influenza A viruses (H1N1, H3N2, and H5N1). An LF loop primer for M gene was labeled with a Digoxigenin hapten. The rejection of Claims 13-18 under 35 U.S.C. 103 (a) (1) by (202021100985U1. (985U1) had been removed necessitated by Applicants’ amendment. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claim 16 is rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Some of the dye cited in the claim 13 is either halochromic dye nor metallochromic dye. For instance, TAMRA (carboxytetramethylrhodamine) or Texas Red is fundamentally a fluorescent xanthene dye rather than a classical metachromatic or halochromic dye. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to BAO Q LI whose telephone number is (571)272-0904. The examiner can normally be reached M-F 8 am to 8 pm EST. 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 Allen can be reached at 571-270-3497. 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. BAO Q. LI Examiner Art Unit 1671 /BAO Q LI/Primary Examiner, Art Unit 1671
Read full office action

Prosecution Timeline

Mar 23, 2023
Application Filed
Feb 25, 2026
Non-Final Rejection mailed — §102, §103, §112
May 18, 2026
Response Filed
Jun 03, 2026
Final Rejection mailed — §102, §103, §112
Aug 10, 2026
Request for Continued Examination
Aug 11, 2026
Response after Non-Final Action
Sep 02, 2026
Non-Final Rejection mailed — §102, §103, §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

3-4
Expected OA Rounds
75%
Grant Probability
99%
With Interview (+26.8%)
2y 10m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 912 resolved cases by this examiner. Grant probability derived from career allowance rate.

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