Last updated: May 29, 2026

Application No. 18/313,523

METHODS FOR REMOVING DEICING SALT IONS FROM WATER RUNOFF

Final Rejection

Filed

May 08, 2023

Priority

May 09, 2022 — provisional 63/364,384

Examiner

PATEL, PRANAV N

Art Unit

1777

Tech Center

1700 — Chemical & Materials Engineering

Assignee

VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

OA Round

2 (Final)

Interview Optional

— +22.1% interview lift. Examiner has a relatively high allowance rate (68%); +22.1% interview lift. A written response may suffice.

Based on 641 resolved cases, 2023–2026

Examiner Intelligence

PATEL, PRANAV N View full profile →

Grants 68% — above average

Career Allowance Rate

437 granted / 641 resolved

+3.2% vs TC avg

Strong +22% interview lift

Without

With

+22.1%

Interview Lift

resolved cases with interview

Typical timeline

2y 11m

Avg Prosecution

34 currently pending

Career history

688

Total Applications

across all art units

Statute-Specific Performance

§101

0.1%

-39.9% vs TC avg

§103

89.5%

+49.5% vs TC avg

§102

4.6%

-35.4% vs TC avg

§112

4.3%

-35.7% vs TC avg

Black line = Tech Center average estimate • Based on career data from 641 resolved cases

Prosecution Timeline

May 08, 2023

Application Filed

Sep 08, 2025

Non-Final Rejection mailed

Dec 08, 2025

Response Filed

Mar 18, 2026

Final Rejection mailed (current)

Precedent Cases

Applications granted by this same examiner with similar technology

17/809,447

Patent 12636620

SYSTEMS AND METHODS FOR TREATMENT OF ELEVATED ORGANIC CONTENT STREAMS

3y 11m to grant Granted May 26, 2026

18/328,199

Patent 12636622

PREPARATION METHOD OF REVERSE OSMOSIS COMPOSITE MEMBRANE AND REVERSE OSMOSIS COMPOSITE MEMBRANE PREPARED THEREBY

2y 11m to grant Granted May 26, 2026

17/741,364

Patent 12623930

APPARATUS, METHOD AND SYSTEM FOR DESALINATING WATER USING ENERGY RECOVERY

4y 0m to grant Granted May 12, 2026

17/926,103

Patent 12623188

FORWARD OSMOSIS DRIVEN BY ELECTROLYSIS

3y 5m to grant Granted May 12, 2026

17/268,497

Patent 12616918

A Connection Device for a Separation System such as a Chromatography System

5y 2m to grant Granted May 05, 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

68%

Grant Probability

90%

With Interview (+22.1%)

2y 11m (~0m remaining)

Median Time to Grant

Moderate

PTA Risk

Based on 641 resolved cases by this examiner. Grant probability derived from career allowance rate.