PlainPatent

CPC technology class · C08

C08J - Working-up

Working-up; general processes of compounding; after-treatment not covered by subclasses c08b, c08c, c08f, c08g or c08h. 21,338 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

21,338
US patents granted
C08
Parent CPC class
20
Active assignees
+35%
5-yr velocity

The verdict

Working-up ranks #97 of 670 CPC technology areas - 21,338 US patents granted since 2015, with filing up 35% over five years.

#97
of 670 CPC technology areas
21,338
US patents granted, 2015–2025
Lg Chem
leading assignee (749)
+35%
filing velocity, last 5 yrs
Top assignee: LG CHEM, Ltd. (749 patents)

CPC subclass C08J - WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H - covers 21,338 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class C08 (ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON). See our CPC classification guide for how the system works.

The competitive landscape in C08J is shaped by 20 distinct companies actively filing in this space. LG CHEM, Ltd. leads with 749 patents, followed by DOW Global Technologies Llc at 438 grants and Toray Industries, Inc. at 361.

Filing activity in C08J is up 35% over the past five years versus 2015-2019, a sharp acceleration suggesting an emerging or fast-moving technology area. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is C08J innovation accelerating?

US utility-patent grants per year in C08J, 2015–2025 - recent five years are up 35% versus 2015–2019.

1,2001,4001,6001,8002,0002,2002,400 20152016201720182019202020212022202320242025 1,413

Who leads C08J?

The 12 most active assignees in WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H - wider bars mean more grants

patents

What this shows Lg Chem is the most active filer in C08J, holding 749 of the 21,338 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 C08J
Rank Company Patents in C08J
#1 LG CHEM, Ltd. 749
#2 DOW Global Technologies Llc 438
#3 Toray Industries, Inc. 361
#4 BASF SE 330
#5 3M Innovative Properties Company 323
#6 Sabic Global Technologies B.v. 177
#7 Mitsubishi Chemical Corporation 174
#8 Mitsubishi Gas Chemical Company, Inc. 166
#9 Exxonmobil Chemical Patents Inc. 160
#10 Arkema France 151
#11 The Procter & Gamble Company 148
#12 ZEON Corporation 136
#13 Kuraray Co., Ltd. 134
#14 Kaneka Corporation 131
#15 Borealis Ag 131
#16 Daikin Industries, Ltd. 117
#17 Toyobo Co., Ltd. 117
#18 Sekisui Chemical Co., Ltd. 116
#19 Nitto Denko Corporation 115
#20 Xerox Corporation 109

About This Class

CPC subclass C08J belongs to class C08.

21,338 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 C08J 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 C08J assignees by class footprint. Bubble size = patents in C08J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 C08J assignees by class footprint. Bubble size = patents in C08J. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 0200400600800 Patents in C08J Avg claims / patent (company-wide) Lg ChemDow GlobalToray IndustriesBasf Se3m Innovative Propert…Sabic Global B VMitsubishi ChemicalMitsubishi Gas Chemic…Exxonmobil Chemical P…Arkema FranceThe Procter & GambleZeonKurarayKaneka
Top 14 C08J assignees by class footprint. Bubble size = patents in C08J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class C08J?
CPC subclass C08J covers WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H. It belongs to CPC class C08 (ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON), with 21,338 US utility patents granted since 2015.
How many patents have been filed in C08J?
21,338 US utility patents were granted in CPC subclass C08J between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in C08J?
LG CHEM, Ltd. leads C08J with 749 patents, making it the most active assignee in this technology area.
How is patent data for C08J 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., C08) is a broad technology category. Subclasses like C08J 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.