CPC technology class · C01

C01G - Compounds Containing Metals NOT Covered BY Subclasses C01…

Compounds containing metals not covered by subclasses c01d or c01f. 6,857 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

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

6,857
US patents granted: C01
Parent CPC class: 20
Active assignees: +45%
5-yr velocity

The verdict

Compounds Containing Metals NOT Covered BY Subclasses C01… ranks #209 of 670 CPC technology areas - 6,857 US patents granted since 2015, with filing up 45% over five years.

#209
of 670 CPC technology areas: 6,857
US patents granted, 2015–2025: Samsung
leading assignee (300): +45%
filing velocity, last 5 yrs

Top assignee: Samsung Electronics Co., Ltd. (300 patents)

CPC subclass C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F - covers 6,857 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class C01 (INORGANIC CHEMISTRY). See our CPC classification guide for how the system works.

The competitive landscape in C01G is shaped by 20 distinct companies actively filing in this space. Samsung Electronics Co., Ltd. leads with 300 patents, followed by LG Energy Solution, Ltd. at 77 grants and Umicore at 73.

Filing activity in C01G is up 45% 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 C01G innovation accelerating?

US utility-patent grants per year in C01G, 2015–2025 - recent five years are up 45% versus 2015–2019.

Sumitomo Metal Mining

249
Lg Energy Solution

77
Umicore

73
Nichia

55
Umicore Korea

50
Ecopro Bm

45
Toda Kogyo

36
Imam Abdulrahman Bin…

35
Uchicago Argonne

34
National Institute of…

33
Dowa Materials

33
Mitsui Mining & Smelt…

32

What this shows Samsung is the most active filer in C01G, holding 300 of the 6,857 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

View data table

Top patent holders in CPC subclass C01G
Rank	Company	Patents in C01G
#1	Sumitomo Metal Mining Co., Ltd.	249
#2	LG Energy Solution, Ltd.	77
#3	Umicore	73
#4	Nichia Corporation	55
#5	Umicore Korea Ltd.	50
#6	Ecopro BM Co., Ltd.	45
#7	TODA Kogyo Corp.	36
#8	Imam Abdulrahman Bin Faisal University	35
#9	Uchicago Argonne, Llc	34
#10	National Institute Of Advanced Industrial Science And Technology	33
#11	DOWA Electronics Materials Co., Ltd.	33
#12	Mitsui Mining & Smelting Co., Ltd.	32
#13	JX Nippon Mining & Metals Corporation	31
#14	Sakai Chemical Industry Co., Ltd.	29
#15	GS Yuasa International Ltd.	26
#16	M. Technique Co., Ltd.	25
#17	Contemporary Amperex Technology Co., Limited	24
#18	SK On Co., Ltd.	24
#19	Iucf-hyu (industry-university Cooperation Foundation Hanyang University)	24
#20	Powdertech Co., Ltd.	23

About This Class

CPC subclass C01G belongs to class C01.

6,857 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 C01G 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 C01G assignees by class footprint. Bubble size = patents in C01G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class C01G?

CPC subclass C01G covers COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F. It belongs to CPC class C01 (INORGANIC CHEMISTRY), with 6,857 US utility patents granted since 2015.

How many patents have been filed in C01G?

6,857 US utility patents were granted in CPC subclass C01G between 2015 and 2025, based on USPTO PatentsView data.

Which company holds the most patents in C01G?

Samsung Electronics Co., Ltd. leads C01G with 300 patents, making it the most active assignee in this technology area.

How is patent data for C01G 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., C01) is a broad technology category. Subclasses like C01G 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.