Last updated: May 29, 2026

Application No. 18/371,097

Nasal Cannula With at Least One Valve

Final Rejection

Filed

Sep 21, 2023

Priority

Sep 21, 2022 — provisional 63/408,653

Examiner

DITMER, KATHRYN ELIZABETH

Art Unit

3785

Tech Center

3700 — Mechanical Engineering & Manufacturing

Assignee

Oxfo Corporation

OA Round

2 (Final)

Interview Optional

— +49.3% interview lift. Interview already conducted in this application's prosecution history. This examiner has a 58% grant rate with +49.3% interview lift. Since an interview has already been tried, recommend written response with narrowed claims based on precedent claim evolution patterns.

Based on 753 resolved cases, 2023–2026

Examiner Intelligence

DITMER, KATHRYN ELIZABETH View full profile →

Grants 58% of resolved cases

Career Allowance Rate

436 granted / 753 resolved

-12.1% vs TC avg

Strong +49% interview lift

Without

With

+49.3%

Interview Lift

resolved cases with interview

Typical timeline

3y 6m

Avg Prosecution

37 currently pending

Career history

810

Total Applications

across all art units

Statute-Specific Performance

§101

0.6%

-39.4% vs TC avg

§103

78.5%

+38.5% vs TC avg

§102

9.5%

-30.5% vs TC avg

§112

10.0%

-30.0% vs TC avg

Black line = Tech Center average estimate • Based on career data from 753 resolved cases

Prosecution Timeline

Sep 21, 2023

Application Filed

Apr 01, 2025

Non-Final Rejection mailed

Apr 04, 2025

Applicant Interview (Telephonic)

Apr 04, 2025

Examiner Interview Summary

Jul 01, 2025

Response Filed

Sep 09, 2025

Final Rejection mailed (current)

Precedent Cases

Applications granted by this same examiner with similar technology

17/614,377

Patent 12636451

AIRWAY MANAGEMENT DEVICE WITH CURVED STYLET

4y 6m to grant Granted May 26, 2026

17/947,453

Patent 12623042

ENDOTRACHEAL TUBE RELIEF VALVE

3y 7m to grant Granted May 12, 2026

18/142,327

Patent 12582786

Compliance Monitor for Loosely Coupling to an Inhaler

2y 10m to grant Granted Mar 24, 2026

17/782,303

Patent 12569401

ELONGATE FORM MEDICAMENT CARRIER AND MEDICAMENT DISPENSER

3y 9m to grant Granted Mar 10, 2026

18/085,299

Patent 12569633

OSCILLATORY RESPIRATORY CARE APPARATUS

3y 2m to grant Granted Mar 10, 2026

Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.

Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4

Expected OA Rounds

58%

Grant Probability

99%

With Interview (+49.3%)

3y 6m (~10m remaining)

Median Time to Grant

Moderate

PTA Risk

Based on 753 resolved cases by this examiner. Grant probability derived from career allowance rate.