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CPC technology class · C25

C25D - Processes FOR THE Electrolytic OR Electrophoretic Product…

Processes for the electrolytic or electrophoretic production of coatings; electroforming; apparatus therefor. 6,127 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

6,127
US patents granted
C25
Parent CPC class
20
Active assignees
+11%
5-yr velocity

The verdict

Processes FOR THE Electrolytic OR Electrophoretic Product… ranks #232 of 670 CPC technology areas - 6,127 US patents granted since 2015, with filing up 11% over five years.

#232
of 670 CPC technology areas
6,127
US patents granted, 2015–2025
Ebara
leading assignee (187)
+11%
filing velocity, last 5 yrs
Top assignee: Ebara Corporation (187 patents)

CPC subclass C25D - PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR - covers 6,127 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class C25 (ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR). See our CPC classification guide for how the system works.

The competitive landscape in C25D is shaped by 20 distinct companies actively filing in this space. Ebara Corporation leads with 187 patents, followed by Lam Research Corporation at 114 grants and Nippon Steel Corporation at 91.

Filing activity in C25D is up 11% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is C25D innovation accelerating?

US utility-patent grants per year in C25D, 2015–2025 - recent five years are up 11% versus 2015–2019.

300400500600700 20152016201720182019202020212022202320242025 358

Who leads C25D?

The 12 most active assignees in PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR - wider bars mean more grants

patents

What this shows Ebara is the most active filer in C25D, holding 187 of the 6,127 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
View data table
Top patent holders in CPC subclass C25D
Rank Company Patents in C25D
#1 Ebara Corporation 187
#2 Lam Research Corporation 114
#3 Nippon Steel Corporation 91
#4 Atotech Deutschland Gmbh & Co. KG 89
#5 Rohm And Haas Electronic Materials Llc 86
#6 JFE Steel Corporation 85
#7 Novellus Systems, Inc. 69
#8 JX Nippon Mining & Metals Corporation 52
#9 PPG Industries Ohio, Inc. 51
#10 Nippon Steel & Sumitomo Metal Corporation 50
#11 Mitsubishi Materials Corporation 49
#12 Chang CHUN Petrochemical Co., Ltd. 43
#13 TOYO Kohan Co., Ltd. 39
#14 Modumetal, Inc. 33
#15 Macdermid Enthone Inc. 32
#16 Fabric8labs, Inc. 32
#17 Arcelormittal 29
#18 DOWA Metaltech Co., Ltd. 23
#19 C.uyemura & Co., Ltd. 22
#20 Mitsui Mining & Smelting Co., Ltd. 21

About This Class

CPC subclass C25D belongs to class C25.

6,127 patents were granted in this class between 2015 and 2025.

20 companies actively patent in this space.

Classification System

Cooperative Patent Classification (CPC) is a hierarchical patent classification system used by the USPTO and EPO.

← All Technology Classes Technology Rankings →

Footprint here vs. claim strategy

Each dot is a leading C25D assignee, placed by how many patents it holds in this class (horizontal) against its company-wide average claims per patent (vertical) - a read on whether the class is led by broad-but-shallow filers or focused deep-claim players.

Top 14 C25D assignees by class footprint. Bubble size = patents in C25D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 C25D assignees by class footprint. Bubble size = patents in C25D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 050100150200 Patents in C25D Avg claims / patent (company-wide) EbaraLam ResearchNippon SteelAtotech Deutschland &…Rohm and Haas Materia…Jfe SteelNovellus SystemsJx Nippon Mining & Me…Ppg Industries OhioNippon Steel & Sumito…Mitsubishi MaterialsChang Chun Petrochemi…Toyo KohanModumetal
Top 14 C25D assignees by class footprint. Bubble size = patents in C25D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class C25D?
CPC subclass C25D covers PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR. It belongs to CPC class C25 (ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR), with 6,127 US utility patents granted since 2015.
How many patents have been filed in C25D?
6,127 US utility patents were granted in CPC subclass C25D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in C25D?
Ebara Corporation leads C25D with 187 patents, making it the most active assignee in this technology area.
How is patent data for C25D collected?
Patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office. It covers all US granted utility patents and assigns CPC codes based on the technology described in each patent.
What is the difference between CPC class and subclass?
A CPC class (e.g., C25) is a broad technology category. Subclasses like C25D provide finer granularity within that category. PlainPatent organizes data at the subclass level (4-character codes) for the most useful view of technology domains.

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

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

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.