Last updated: July 11, 2026

Application No. 19/554,575

Untitled Application

Unknown

Filed

Priority

Nov 11, 2020 — provisional 63/112,434 +2 more

Examiner

TRAN, SUSAN T

Art Unit

Tech Center

SPERO THERAPEUTICS, INC.

Assignee

Spero Therapeutics Inc.

OA Round

1 (Non-Final)

This examiner grants 63% of cases after interview

— +35.6% interview lift. A telephonic interview to clarify the technical implementation could significantly improve the outcome.

Based on 1025 resolved cases, 2023–2026

Examiner Intelligence

TRAN, SUSAN T View full profile →

Grants 63% of resolved cases

Career Allowance Rate

642 granted / 1025 resolved

+2.6% vs TC avg

Strong +36% interview lift

Without

With

+35.6%

Interview Lift

resolved cases with interview

Typical timeline

3y 1m

Avg Prosecution

31 currently pending

Career history

1069

Total Applications

across all art units

Statute-Specific Performance

§101

0.1%

-39.9% vs TC avg

§103

78.4%

+38.4% vs TC avg

§102

12.9%

-27.1% vs TC avg

§112

4.2%

-35.8% vs TC avg

Black line = Tech Center average estimate • Based on career data from 1025 resolved cases

Prosecution Timeline

Apr 16, 2026

Non-Final Rejection mailed (current)

Precedent Cases

Applications granted by this same examiner with similar technology

19/238,194

Patent 12661408

PHARMACEUTICAL COMPOSITIONS COMPRISING BUPROPION AND CYSTEINE

1y 0m to grant Granted Jun 23, 2026

18/560,039

Patent 12653791

TRIMODAL, PRECISION-TIMED PULSATILE RELEASE TABLET

2y 7m to grant Granted Jun 16, 2026

18/784,276

Patent 12653789

ADAGRASIB SOLID PHARMACEUTICAL COMPOSITIONS

1y 10m to grant Granted Jun 16, 2026

18/629,431

Patent 12642762

ALLERGENIC PROTEIN FORMULATIONS FOR IMMUNOTHERAPY

2y 1m to grant Granted Jun 02, 2026

17/922,623

Patent 12605393

NEW COMPOSITIONS FOR ORAL OR NASAL USE

3y 5m to grant Granted Apr 21, 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

1-2

Expected OA Rounds

63%

Grant Probability

98%

With Interview (+35.6%)

3y 1m

Median Time to Grant

Low

PTA Risk

Based on 1025 resolved cases by this examiner. Grant probability derived from career allowance rate.