Prosecution Insights
Last updated: April 19, 2026
Application No. 18/227,224

METHODS FOR NON-INVASIVE PRENATAL PLOIDY CALLING

Non-Final OA §102
Filed
Jul 27, 2023
Examiner
PRIEST, AARON A
Art Unit
1681
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Natera Inc.
OA Round
1 (Non-Final)
61%
Grant Probability
Moderate
1-2
OA Rounds
3y 0m
To Grant
87%
With Interview

Examiner Intelligence

Grants 61% of resolved cases
61%
Career Allow Rate
486 granted / 794 resolved
+1.2% vs TC avg
Strong +26% interview lift
Without
With
+26.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
30 currently pending
Career history
824
Total Applications
across all art units

Statute-Specific Performance

§101
7.0%
-33.0% vs TC avg
§103
31.8%
-8.2% vs TC avg
§102
21.7%
-18.3% vs TC avg
§112
22.4%
-17.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 794 resolved cases

Office Action

§102
Notice of Pre-AIA or AIA Status The present application is being examined under the pre-AIA first to invent provisions. DETAILED ACTION Status of the Claims Claims 1-20 are pending and the subject of this NON-FINAL Office Action. Large IDSs With Multiple Irrelevant References/No IDS Fee The IDS filed 08/13/2025, which has over 400 references, has not been considered because it was not filed with a proper IDS size fee. See 37 § C.F.R. 1.17(v); https://www.uspto.gov/sites/default/files/documents/quick-reference-guide-to-the-information-disclosure-statement-ids.pdf. Applicants filed 80 pages of IDS with over 1,000 listed references. First, it is impossible to search in detail through all 1,000-plus references in any reasonable amount of time. Second, this is not the first application in this family of applications; in fact, there are over 100 others. Applicants have had ample opportunity to winnow their IDS down to only claim-relevant references. Furthermore, after a random skim of the references in the IDS 01/17/2025 within the incredibly limited time allotted to the Examiner, the Examiner determines that many of the references are irrelevant to the claimed subject matter, having nothing to do with the allele-frequency system claimed. Which leads to the larger problem: which references are relevant, and why were these seemingly irrelevant references filed? Before filing an IDS, Applicants have a duty to examine the references themselves and determine which references are reasonably pertinent to the claimed invention. If any particular preference(s) is/are directly pertinent to the claimed invention, then Applicants are encouraged to point this out in the form of a new IDS. Priority The claims receive a priority date of 05/18/2011 because the non-provisional application (13/300235) filed on that date is the first priority document to disclose a single system comprising a sequencer and a computer processer programmed to receive the sequencing reads, quantify the sequencing reads corresponding to each allele at the polymorphic loci, and measure the amount of DNA from the first individual in the biological sample of the second individual based on allele frequencies at a plurality of the polymorphic loci. Claim interpretations Claim 1 is directed to a system (i.e. product) with the following generic structure: A sequencer; and computer processer programmed to receive sequencing reads, quantify the sequencing reads corresponding to any alleles at any polymorphic loci, and measure the amount of DNA based on allele frequencies at a plurality of the polymorphic loci. All other claims merely recite intended uses of the system; thus, they fail to distinguish the system over the prior art. 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) A person shall be entitled to a patent unless – (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; or (2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claims 1-20 are rejected under 35 U.S.C. § 102(a)(1) as being anticipated by DHALLAN (US 7,332,277). As to claim 1, DHALLAN teaches a system comprising a sequencer (cols. 63-65, describing sequencing analysis using sequencer); and computer processer programmed to receive sequencing reads, quantify the sequencing reads corresponding to any alleles at any polymorphic loci, and measure the amount of DNA based on allele frequencies at a plurality of the polymorphic loci (GeneScan or ImageQuant programming; col. 65, l. 29 – col. 66, l. 20). Specifically, DHALLAN teaches In one embodiment, the ratio of alleles at a heterozygous locus of interest can be calculated. The intensity of a nucleotide at the loci of interest can be quantified using any number of computer programs including but not limited to GeneScan and ImageQuant. For example, for a heterozygous SNP, there are two nucleotides, and each should be present in a 1:1 ratio. In a preferred embodiment, the ratio of multiple heterozygous SNPs can be calculated. In one embodiment, the ratio for a variable nucleotide at alleles at a heterozygous locus of interest can be calculated. The intensity of each variable nucleotide present at the loci of interest can be quantified using any number of computer programs including but not limited to GeneScan and ImageQuant. For example, for a heterozygous SNP, there will be two nucleotides present, and each may be present in a 1:1 ratio. In a preferred embodiment, the ratio of multiple heterozygous SNPs can be calculated (col. 65, ll. 30-47). Claims 1-20 are rejected under 35 U.S.C. § 102(a)(2) as being anticipated by RAVA (US 2012/0010085). As to claim 1, RAVA teaches a system comprising a sequencer (para. 0189); and computer processer programmed to receive sequencing reads, quantify the sequencing reads corresponding to any alleles at any polymorphic loci, and measure the amount of DNA based on allele frequencies at a plurality of the polymorphic loci (para. 0190). Specifically, RAVA teaches c. Analysis of Sequencing Data for the Determination of Fetal Fraction Upon completion of sequencing of the sample, the Illumina “Sequencer Control Software” transferred image and base call files to a Unix server running the Illumina “Genome Analyzer Pipeline” software version 1.51. the 36 bp reads were aligned to an artificial reference genome e.g. a SNP genome, using the BOWTIE program. The artificial reference genome was identified as the grouping of the polymorphic DNA sequences that encompass the alleles comprised in the polymorphic target sequences. For example, the artificial reference genome is a SNP genome comprising SEQ ID NOs: 1-56. Only reads that mapped uniquely to the artificial genome were used for the analysis of fetal fraction. Reads that matched perfectly to the SNP genome were counted as tags and filtered. Of the remaining reads, only reads having one or two mismatches were counted as tags and included in the analysis. Tags mapped to each of the polymorphic alleles were counted, and the fetal fraction was determined as a percent of the ratio of the number of tags mapped to the major allele i.e. maternal allele, and the number of tags mapped to the minor allele i.e. fetal allele. (id.) Prior Art The following prior art also teaches system with sequencer and programmed processor for allele frequency determination: US 2010/0273219; US 20080044831 (para. 0394); US 20170039318 (claim 1); US20090099789. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Aaron Priest whose telephone number is (571)270-1095. The examiner can normally be reached 8am-6pm. 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, Gary Benzion can be reached at (571) 272-0782. 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. /AARON A PRIEST/Primary Examiner, Art Unit 1681
Read full office action

Prosecution Timeline

Jul 27, 2023
Application Filed
Feb 05, 2026
Non-Final Rejection — §102 (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
61%
Grant Probability
87%
With Interview (+26.0%)
3y 0m
Median Time to Grant
Low
PTA Risk
Based on 794 resolved cases by this examiner. Grant probability derived from career allow rate.

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