USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Dongjin Semichem Co., Ltd.

USPTO PatentsView assignee record - 39 granted patents across 34 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: C09D (COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERI).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

12.8

Avg claims per patent

-5%

5-year filing velocity

The verdict

Dongjin holds 39 US patents across 34 technology areas, rank #8,186 of 50,000 tracked assignees.

#8,186
of 50,000 US assignees by volume: Top 26%
by Innovation Score (44.4/100): 12.8
avg claims per patent: -5%
filing velocity, last 5 yrs

Portfolio overview

Dongjin Semichem Co., Ltd. has been granted 39 US utility patents between 2015 and 2025, placing Dongjin Semichem Co., Ltd. at rank #8,186 across all assignees tracked by PlainPatent. This portfolio spans 34 distinct Cooperative Patent Classification (CPC) subclasses, averaging 12.8 claims per patent with primary concentration in C09D (COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERI). As a Foreign Corporation, Dongjin Semichem Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Dongjin sits between Conexant Systems, Llc (39 patents, rank #8,182) and E-link Plastic & Metal Industrial Co., Ltd. (39 patents, rank #8,190) - the closest US assignees by grant volume. The composite Innovation Score of 44.4/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 19 grants, compared with 20 in the 2015–2019 window, a -5% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. Dongjin Semichem Co., Ltd.'s 12.8 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while a multi-domain presence across 34 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Dongjin Semichem Co., Ltd. against peers pursuing similar technology classes.

Conexant Systems

39
Curemark

39
Cydex Pharmaceuti…

39
Doheny EYE Instit…

39
DSM&T

39
Deep Science

39
Dick's Sporting G…

39
E-link Plastic &…

39
Dongjin Semichem ◀

39

What this shows Dongjin holds 39 patents at rank #8,186, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Dongjin

By rank, the assignees closest to #8,186 in granted patent volume.

Leaders in C09D (Coating Compositions)

Other assignees with the most granted patents in Dongjin's primary technology class.

Dongjin's Innovation Score vs. every tracked assignee

Composite of portfolio volume, filing velocity, technology breadth, and claim depth (0–100)

44 Top 26% higher than 74% of 50,000 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Dongjin Semichem Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	4	10.3%
2016	4	10.3%
2017	3	7.7%
2018	4	10.3%
2019	5	12.8%
2020	5	12.8%
2021	4	10.3%
2022	3	7.7%
2023	2	5.1%
2024	2	5.1%
2025	3	7.7%

Which technologies does Dongjin Semichem Co., Ltd. patent most?

C09D - COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR 19

C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS 12

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 12

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 11

C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE 10

G03F - PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; 8

C07D - HETEROCYCLIC COMPOUNDS 6

H01B - CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES 5

C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS 5

B05D - PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL 5

H10F - INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION 4

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 4

H10K - ORGANIC ELECTRIC SOLID-STATE DEVICES 4

C08L - COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 4

C09G - POLISHING COMPOSITIONS ; SKI WAXES 4

Top 15 of 34 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Multi-domain

Claim Depth Standard

Velocity Declining

Where it ranks

Overall rank by patents

#8,186

Across all tracked assignees

Innovation Score

44.4 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Dongjin Semichem Co., Ltd. hold?

Dongjin Semichem Co., Ltd. holds 39 US granted patents filed between 2015 and 2025, spanning 34 technology areas.

What is Dongjin Semichem Co., Ltd.'s Innovation Score?

Dongjin Semichem Co., Ltd. has an Innovation Score of 44.4 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Dongjin Semichem Co., Ltd. focus on?

Dongjin Semichem Co., Ltd.'s top technology area is C09D (COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR) with 19 patents. The company has filed patents in 34 CPC subclasses total.

Is Dongjin Semichem Co., Ltd.'s patent filing rate increasing or decreasing?

Dongjin Semichem Co., Ltd.'s recent filing velocity is -5% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for Dongjin Semichem Co., Ltd.'s patents?

Dongjin Semichem Co., Ltd.'s patents average 12.8 claims each. This falls within the standard range, providing solid legal coverage.

How is the Dongjin Semichem Co., Ltd. patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

How to use this portfolio

Dongjin's 39 grants land it in the top 26% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - Dongjin ranks #8,186 of 50,000. Top 50 holders
Most of this portfolio concentrates in C09D - see who else leads that technology area. C09D leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.