CPC technology class · C01

C01F - Compounds Of The Metals Beryllium

Compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare-earth metals. 2,333 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

2,333
US patents granted: #4/6
in C01: 5.4%
C01 class share: +18%
5-yr velocity

The verdict

According to USPTO PatentsView, Compounds Of The Metals Beryllium ranks #352 of 670 CPC technology areas - 2,333 US patents granted since 2015, with recorded grant volume up 18% over five years.

#352
of 670 CPC technology areas: 2,333
US patents granted, 2015–2025: Omya International
leading assignee (83): +18%
grant velocity, last 5 yrs

How C01F's grant cadence moved

Between 2020–2024, C01F recorded 1,078 grants versus 915 in 2015–2019 (+18% equal-window velocity). Across complete years, output peaked in 2019 at 235 grants and bottomed in 2015 at 145 (+62% peak-over-trough). Lead assignee Omya International AG holds 3.6% of the class ; the top three share 5.2%.

Leaderboard read

C01F concentration, lead at 3.6%

Omya International AG leads this historical grant record at 3.6% of C01F - foreign corporation assignees hold 62% of class grants (527 of 844). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 3.6%
Top three share: 5.2%
Lead over #2: 60

Where C01F sits inside C01

Among 6 subclasses in C01 (Inorganic Chemistry), C01F ranks #4 and holds 5.4% 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 C01P 12,347 C01G 6,857 C01D 976 C01C 735

Rising assignees active in C01F

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 Mangrove Water Technologies Ltd. 12x 0 → 12 company-wide · 10 in C01F
#2 Arelac, Inc. 10x 0 → 10 company-wide · 6 in C01F
#3 Calcean Minerals and Materials, LLC 7.00x 1 → 7 company-wide · 6 in C01F
#4 Qinghai Institute OF Salt Lakes, Chinese Academy OF Sciences 7.00x 1 → 7 company-wide · 5 in C01F
#5 Daiichi Kigenso Kagaku Kogyo Co., Ltd. 6.50x 2 → 13 company-wide · 5 in C01F

C01F grants by year, peak 2019 (235)

US utility-patent grants per year in C01F, 2015–2025 - recent five years are up 18% versus 2015–2019.

Omya International

83
Saint-gobain Ceramics…

23
Purac Biochem Bv

16
Lhoist Recherche et…

16
Mississippi Lime

16
Innovator Energy

13
M Technique

11
Sakai Chemical…

11
Ube Material…

10
Mangrove Water

10
Cerion

9
Frs Group

9

What this shows Omya International is the most active filer in C01F, holding 83 of the 2,333 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 C01F
Rank	Company	Patents in C01F
#1	Omya International AG	83
#2	Saint-gobain Ceramics & Plastics, Inc.	23
#3	Purac Biochem BV	16
#4	S.A. Lhoist Recherche et Développement	16
#5	Mississippi Lime Company	16
#6	Innovator Energy LLC.	13
#7	M. Technique Co., Ltd.	11
#8	Sakai Chemical Industry Co., Ltd.	11
#9	UBE Material Industries, Ltd.	10
#10	Mangrove Water Technologies Ltd.	10
#11	Cerion, LLC	9
#12	FRS Group, LLC	9
#13	Orbite Technologies Inc.	9
#14	Worcester Polytechnic Institute	8
#15	Calix, Inc.	8
#16	Tateho Chemical Industries Co., Ltd	8
#17	Fujimi Incorporated	7
#18	Korea Institute Of Geoscience And Mineral Resources	7
#19	Nippon Paper Industries Co., Ltd.	7
#20	Cytec Industries, Inc.	7

Footprint here vs. claim strategy

Each dot is a leading C01F 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 C01F assignees by class footprint. Bubble size = patents in C01F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near C01F's 2,333-grant footprint

Nationwide nearest neighbors for C01F (#352 of 670 by volume ; lead share 3.6%) - not the C01 parent-class siblings above.

Nearest by grant volume

B23C 2,322 B30B 2,314 G04B 2,356 B07C 2,293

Nearest by lead-assignee share

G10K 3.6% A23K 3.6% F23L 3.6% C05D 3.5%

Questions about C01F

Which company holds the most patents in C01F?

Omya International AG leads C01F with 83 patents (3.6% of the subclass). By PatentsView assignee type, foreign corporations account for 62% of class grants.

Which C01F assignees grew fastest recently?

Among assignees with ≥5 grants in C01F, Mangrove Water Technologies Ltd. shows the highest company-wide grant multiple (12x: 0 grants in 2019–2021 → 12 in 2022–2024) while holding 10 patents in this subclass. Growth is company-wide, not class-only.

How does C01F compare inside parent class C01?

Inside C01 (Inorganic Chemistry), C01F ranks #4 of 6 subclasses by grant volume and holds 5.4% of the parent class total. The largest sibling is C01B (20,252 grants).

What to do with this data

C01F in context - here's where to go next.

Omya International AG leads C01F with 83 grants in this class. See full portfolio
C01F ranks #352 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 - C01F figures are USPTO PatentsView granted-utility totals for this subclass (2,333 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.