Prosecution Insights
Last updated: October 25, 2026

Posco

Technology area: Chemistry & Materials

17 pending office actions • 7 art units • 13 examiners • 0 of 17 (0%) have an AI response strategy ready • 58 patents granted in the last 365 days

Analysis

Posco has 15 pending office actions in Chemistry & Materials. The portfolio spans 11 examiners and 7 art units, showing substantial distribution across examination personnel and technical groups rather than a single prosecution channel.

YANG, JIE is the busiest examiner, with 2 pending matters. That workload is a limited part of the overall pending portfolio, so docket oversight should distinguish examiner-specific issues from themes that recur across art units.

The breadth of assignment supports a centralized prosecution framework. Counsel should track claim amendments, cited prior art, and disclosure positions across the separate matters while preserving flexibility for the practices of each examiner and art unit.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Portfolio Summary

17
Total Pending OAs
5
Non-Final OAs
11
Final Rejections
1
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 11 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

6
Overdue
2
Due this week
3
Due this month
0
Due in next 60 days
0
Due later

Deadline Fire Line

Every pending office action with a known statutory deadline, placed on a days-until-due axis. Dots left of Today are overdue; the further right, the more runway. Cases that share a deadline window stack vertically. 11 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (6)Due ≤ 7 days (2)Due ≤ 30 days (3)

Case Difficulty Mix

Difficulty is derived from the rejection statutes on the most recent pending office action. §101-driven and multi-statute cases are graded Hard; §112-only and obviousness-type double-patenting cases are graded Easy; everything else is Medium. "Unknown" means we have not yet parsed a statute for that office action.

5
Hard (29%)
10
Medium (59%)
2
Easy (12%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only9 (53%)
§112 only2 (12%)
Double-patenting + other1 (6%)
Multi-statute (no §101)5 (29%)

Industry Mix

How the docket's pending cases split across USPTO tech-center bands.

17
Life Sciences
100% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
0
Mechanical / Eng
0% of docket
0
Business / Other
0% of docket

Time-on-OA Estimate

Manual office-action response work runs about 10 hours per case. The time-saved bands below show what IP Author's prosecution pipeline typically delivers — a conservative 20% on the low end, 35% in the middle, 50% on the high end.

170 h
Manual time on pending OAs
34 h
Time saved (low, 20%)
59 h
Time saved (mid, 35%)
1.5 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
YANG, JIE 2 62.5% +19.4%
WALCK, BRIAN D 2 58.9% +26.7%
ALDAZ CERVANTES, MAYELA RENATA 2 73.5% +35.4%
WANG, NICHOLAS A 2 53.5% +22.1%
MCGUTHRY BANKS, TIMA MICHELE 1 81.6% +2.8%
CHRISTY, KATHERINE A 1 75.4% +34.2%
KOSHY, JOPHY STEPHEN 1 63.8% +39.8%
HILL, STEPHANI A 1 29.2% +44.0%
JACKSON, MONIQUE R 1 34.8% +44.3%
CARPENTER, JOSHUA S 1 51.6% +37.2%

Quick Wins (1)

Cases in front of an examiner with an allow rate of 80%+ where the difficulty is Easy or Medium. The top 1 ordered by deadline are shown.

App #TitleExaminerDue in
18019187 AUSTENITIC STAINLESS STEEL WITH IMPROVED DEEP DRAWING MCGUTHRY BANKS, TIMA MICHELE 2d overdue

Hard Cases (6)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 6 ordered by deadline are shown.

App #TitleExaminerDue in
17918014 LOW-COST AUSTENITIC STAINLESS STEEL HAVING HIGH STRENGTH AND HIGH FORMABILITY, AND METHOD FOR MANUFACTURING SAME KOSHY, JOPHY STEPHEN 11d overdue
17787252 GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME ALDAZ CERVANTES, MAYELA RENATA 5d overdue
17785693 NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR WALCK, BRIAN D 6d
17786152 HIGH-STRENGTH FERRITIC STAINLESS STEEL FOR CLAMP, AND MANUFACTURING METHOD THEREFOR ALDAZ CERVANTES, MAYELA RENATA 9d
17954605 IRON-ALUMINUM-BASED PLATED STEEL SHEET FOR HOT PRESS FORMING, HAVING EXCELLENT HYDROGEN DELAYED FRACTURE PROPERTIES AND SPOT WELDING PROPERTIES, AND MANUFACTURING METHOD THEREFOR WALCK, BRIAN D —
17784030 NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME HILL, STEPHANI A —

Interview Candidates (13)

Cases in front of an examiner whose interview lift is 10 percentage points or more — i.e. interviewed cases historically resolve more favorably than non-interviewed ones. The top 8 ordered by deadline are shown.

App #TitleExaminerDue in
17785702 STAINLESS STEEL HAVING EXCELLENT SURFACE ELECTRICAL CONDUCTIVITY FOR FUEL CELL SEPARATOR AND METHOD FOR MANUFACTURING SAME CARPENTER, JOSHUA S 100d overdue
17918014 LOW-COST AUSTENITIC STAINLESS STEEL HAVING HIGH STRENGTH AND HIGH FORMABILITY, AND METHOD FOR MANUFACTURING SAME KOSHY, JOPHY STEPHEN 11d overdue
17769095 STEEL PLATE FOR PRESSURE VESSEL HAVING EXCELLENT RESISTANCE TO HIGH-TEMPERATURE POST-WELDING HEAT TREATMENT, AND METHOD FOR MANUFACTURING SAME WANG, NICHOLAS A 9d overdue
17787252 GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME ALDAZ CERVANTES, MAYELA RENATA 5d overdue
17785693 NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR WALCK, BRIAN D 6d
18271787 PLATED STEEL SHEET FOR HOT PRESS FORMING HAVING EXCELLENT HYDROGEN EMBRITTLEMENT RESISTANCE, HOT PRESS FORMED PARTS, AND MANUFACTURING METHODS THEREOF YANG, JIE 9d
17786152 HIGH-STRENGTH FERRITIC STAINLESS STEEL FOR CLAMP, AND MANUFACTURING METHOD THEREFOR ALDAZ CERVANTES, MAYELA RENATA 9d
17785846 STEEL PLATE HAVING EXCELLENT WEAR RESISTANCE AND COMPOSITE CORROSION RESISTANCE AND METHOD FOR MANUFACTURING SAME CHRISTY, KATHERINE A 28d

Top Art Units

Art UnitApps
1734 5
1733 5
1784 2
1738 2
1735 1
1787 1
1752 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18271787 PLATED STEEL SHEET FOR HOT PRESS FORMING HAVING EXCELLENT HYDROGEN EMBRITTLEMENT RESISTANCE, HOT PRESS FORMED PARTS, AND MANUFACTURING METHODS THEREOF YANG, JIE 1734 §103 Non-Final OA 9d Pending Jul 11, 2023
18019187 AUSTENITIC STAINLESS STEEL WITH IMPROVED DEEP DRAWING MCGUTHRY BANKS, TIMA MICHELE 1733 §112 Non-Final OA 2d overdue Pending Feb 01, 2023
17785846 STEEL PLATE HAVING EXCELLENT WEAR RESISTANCE AND COMPOSITE CORROSION RESISTANCE AND METHOD FOR MANUFACTURING SAME CHRISTY, KATHERINE A 1784 §103 Final Rejection 28d Pending Oct 24, 2022
17918014 LOW-COST AUSTENITIC STAINLESS STEEL HAVING HIGH STRENGTH AND HIGH FORMABILITY, AND METHOD FOR MANUFACTURING SAME KOSHY, JOPHY STEPHEN 1733 §103§112 Non-Final OA 11d overdue Pending Oct 10, 2022
17954605 IRON-ALUMINUM-BASED PLATED STEEL SHEET FOR HOT PRESS FORMING, HAVING EXCELLENT HYDROGEN DELAYED FRACTURE PROPERTIES AND SPOT WELDING PROPERTIES, AND MANUFACTURING METHOD THEREFOR WALCK, BRIAN D 1738 §103§112 Non-Final OA — Pending Sep 28, 2022
17784030 NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME HILL, STEPHANI A 1735 §103 Final Rejection — Pending Jul 22, 2022
17785505 ELECTRICAL STEEL SHEET ADHESIVE COATING COMPOSITION, ELECTRICAL STEEL SHEET LAMINATE, AND METHOD FOR MANUFACTURING SAME JACKSON, MONIQUE R 1787 §103 Final Rejection — Pending Jul 19, 2022
17787252 GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME ALDAZ CERVANTES, MAYELA RENATA 1733 §103§112 Final Rejection 5d overdue Pending Jun 17, 2022
17786152 HIGH-STRENGTH FERRITIC STAINLESS STEEL FOR CLAMP, AND MANUFACTURING METHOD THEREFOR ALDAZ CERVANTES, MAYELA RENATA 1733 §103§112Other Final Rejection 9d Pending Jun 16, 2022
17785702 STAINLESS STEEL HAVING EXCELLENT SURFACE ELECTRICAL CONDUCTIVITY FOR FUEL CELL SEPARATOR AND METHOD FOR MANUFACTURING SAME CARPENTER, JOSHUA S 1733 §102DP Non-Final OA 100d overdue Pending Jun 15, 2022
17785693 NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR WALCK, BRIAN D 1738 §102§103 Final Rejection 6d Pending Jun 15, 2022
17774578 METHOD FOR MANUFACTURING STAINLESS STEEL FOR POLYMER FUEL CELL SEPARATOR COCHENOUR, ZACKARY RICHARD 1752 §103 Final Rejection — Pending May 05, 2022
17771986 REINFORCING MEMBER FOR COLD FORMING AND PARTS MANUFACTURED USING SAME LA VILLA, MICHAEL EUGENE 1784 §112 Final Rejection 8d overdue Pending Apr 26, 2022
17769095 STEEL PLATE FOR PRESSURE VESSEL HAVING EXCELLENT RESISTANCE TO HIGH-TEMPERATURE POST-WELDING HEAT TREATMENT, AND METHOD FOR MANUFACTURING SAME WANG, NICHOLAS A 1734 §103 Final Rejection 9d overdue Pending Apr 14, 2022
17761805 HIGH STRENGTH WIRE ROD HAVING NON-MAGNETIC PROPERTY AND METHOD FOR MANUFACTURING THEREOF WANG, NICHOLAS A 1734 §103 Non-Final OA — Pending Mar 18, 2022
17641728 STEEL SHEET HAVING EXCELLENT UNIFORM ELONGATION AND STRAIN HARDENING RATE, AND METHOD FOR PRODUCING SAME YANG, JIE 1734 §103 Final Rejection — Pending Mar 09, 2022
17298128 NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME LIANG, ANTHONY M 1734 §103 Final Rejection 5d Pending May 28, 2021

Managing Posco's Patent Portfolio?

IP Author helps IP teams respond to office actions faster with AI-generated responses, examiner analytics, and prosecution intelligence.

Start Free Trial

Frequently Asked Questions

How many pending USPTO office actions does Posco have?

Posco has 17 pending office actions as of October 2026, spread across 7 art units and 13 examiners.

Which USPTO examiner handles the most Posco applications?

Jie Yang has the most, with 2 of Posco's pending office actions.

What technology area are Posco's patent applications in?

Mostly Chemistry & Materials (USPTO Tech Center 1700), based on where its pending office actions are examined.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month