CPC technology class · C01

C01P - Indexing Scheme Relating To Structural And Physical Aspec…

Indexing scheme relating to structural and physical aspects of solid inorganic compounds. 12,347 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

12,347
US patents granted: #2/6
in C01: 28.4%
C01 class share: +34%
5-yr velocity

The verdict

According to USPTO PatentsView, Indexing Scheme Relating To Structural And Physical Aspec… ranks #150 of 670 CPC technology areas - 12,347 US patents granted since 2015, with recorded grant volume up 34% over five years.

#150
of 670 CPC technology areas: 12,347
US patents granted, 2015–2025: Samsung
leading assignee (369): +34%
grant velocity, last 5 yrs

How C01P's grant cadence moved

Between 2020–2024, C01P recorded 5,730 grants versus 4,264 in 2015–2019 (+34% equal-window velocity). Across complete years, output peaked in 2024 at 1,281 grants and bottomed in 2015 at 769 (+67% peak-over-trough). Lead assignee Sumitomo Metal Mining Co., Ltd. holds 1.9% of the class ; the top three share 4.2%.

Leaderboard read

C01P concentration, lead at 1.9%

Sumitomo Metal Mining Co., Ltd. leads this historical grant record at 1.9% of C01P - foreign corporation assignees hold 76% of class grants (4,421 of 5,836). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 1.9%
Top three share: 4.2%
Lead over #2: 56

Where C01P sits inside C01

Among 6 subclasses in C01 (Inorganic Chemistry), C01P ranks #2 and holds 28.4% of the parent class's 43,500 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

C01B 20,252 C01G 6,857 C01F 2,333 C01D 976 C01C 735

Rising assignees active in C01P

Company-wide grant multiples (2022–2024 vs 2019–2021) among assignees with ≥5 patents in this subclass. Growth is company-wide; class patent counts are subclass-specific.

#1 LG Energy Solution, Ltd. 770x 2 → 1,539 company-wide · 108 in C01P
#2 SK On Co., Ltd. 243x 0 → 243 company-wide · 28 in C01P
#3 King Faisal University 125x 6 → 747 company-wide · 15 in C01P
#4 Contemporary Amperex Technology (HONG KONG) Limited 87x 0 → 87 company-wide · 24 in C01P
#5 Guangdong Brunp Recycling Technology Co., Ltd. 61x 0 → 61 company-wide · 25 in C01P

C01P grants by year, peak 2024 (1,281)

US utility-patent grants per year in C01P, 2015–2025 - recent five years are up 34% versus 2015–2019.

Sumitomo Metal Mining

231
Omya International

175
Lg Energy Solution

108
Sumitomo Chemical

84
Ngk Insulators

79
King Fahd University…

77
Umicore

77
Nichia

73
Chevron U

66
Rhodia Operations

54
Mitsui Mining &…

52
Umicore Korea

48

What this shows Samsung is the most active filer in C01P, holding 369 of the 12,347 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 C01P
Rank	Company	Patents in C01P
#1	Sumitomo Metal Mining Co., Ltd.	231
#2	Omya International AG	175
#3	LG Energy Solution, Ltd.	108
#4	Sumitomo Chemical Company, Limited	84
#5	NGK Insulators, Ltd.	79
#6	King Fahd University OF Petroleum AND Minerals	77
#7	Umicore	77
#8	Nichia Corporation	73
#9	Chevron U.S.A. Inc.	66
#10	Rhodia Operations	54
#11	Mitsui Mining & Smelting Co., Ltd.	52
#12	Umicore Korea Ltd.	48
#13	Cabot Corporation	47
#14	National Institute of Advanced Industrial Science and Technology	46
#15	King Abdullah University of Science and Technology	45
#16	Ecopro BM Co., Ltd.	45
#17	Imam Abdulrahman Bin Faisal University	42
#18	Tokuyama Corporation	42
#19	Eckart GmbH	42
#20	China Petroleum & Chemical Corporation	41

Footprint here vs. claim strategy

Each dot is a leading C01P 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 C01P assignees by class footprint. Bubble size = patents in C01P. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near C01P's 12,347-grant footprint

Nationwide nearest neighbors for C01P (#150 of 670 by volume ; lead share 3.0%) - not the C01 parent-class siblings above.

Nearest by grant volume

G09B 12,324 H01G 12,443 A01H 12,482 Y04S 12,488

Nearest by lead-assignee share

A01K 3.0% A23N 3.0% C08K 3.0% C04B 3.0%

Questions about C01P

Which company holds the most patents in C01P?

Samsung Electronics Co., Ltd. leads C01P with 369 patents (1.9% of the subclass). By PatentsView assignee type, foreign corporations account for 76% of class grants.

Which C01P assignees grew fastest recently?

Among assignees with ≥5 grants in C01P, LG Energy Solution, Ltd. shows the highest company-wide grant multiple (770x: 2 grants in 2019–2021 → 1,539 in 2022–2024) while holding 108 patents in this subclass. Growth is company-wide, not class-only.

How does C01P compare inside parent class C01?

Inside C01 (Inorganic Chemistry), C01P ranks #2 of 6 subclasses by grant volume and holds 28.4% of the parent class total. The largest sibling is C01B (20,252 grants).

What to do with this data

C01P in context - here's where to go next.

Sumitomo Metal Mining Co., Ltd. leads C01P with 231 grants in this class. See full portfolio
C01P ranks #150 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class C01, the largest sibling subclass is C01B with 20,252 grants. Explore C01B

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - C01P figures are USPTO PatentsView granted-utility totals for this subclass (12,347 grants in the tracked window).

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.