CPC technology class · C05

C05D - Inorganic Fertilisers Not Covered By Subclasses C05b

Inorganic fertilisers not covered by subclasses c05b, c05c; fertilisers producing carbon dioxide. 707 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

707
US patents granted: #4/5
in C05: 16.3%
C05 class share: +10%
5-yr velocity

The verdict

According to USPTO PatentsView, Inorganic Fertilisers Not Covered By Subclasses C05b ranks #499 of 670 CPC technology areas - 707 US patents granted since 2015, with recorded grant volume up 10% over five years.

#499
of 670 CPC technology areas: 707
US patents granted, 2015–2025: Cool Planet Energy System
leading assignee (25): +10%
grant velocity, last 5 yrs

How C05D's grant cadence moved

Between 2020–2024, C05D recorded 331 grants versus 300 in 2015–2019 (+10% equal-window velocity). Across complete years, output peaked in 2020 at 87 grants and bottomed in 2017 at 43 (+102% peak-over-trough). Lead assignee Cool Planet Energy System, Inc. holds 3.5% of the class ; the top three share 8.3%.

Leaderboard read

C05D concentration, lead at 3.5%

Cool Planet Energy System, Inc. leads this historical grant record at 3.5% of C05D - us corporation assignees hold 70% of class grants (226 of 322). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 3.5%
Top three share: 8.3%
Lead over #2: 7

Where C05D sits inside C05

Among 5 subclasses in C05 (FERTILISERS; Manufacture Thereof), C05D ranks #4 and holds 16.3% of the parent class's 4,334 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

C05G 1,232 C05F 1,129 C05C 753 C05B 513

Rising assignees active in C05D

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 Soilgenic Technologies, LLC 14x 0 → 14 company-wide · 7 in C05D
#2 Sabic Agri-nutrients Company 4.00x 0 → 4 company-wide · 5 in C05D
#3 Specialty Granules Investments LLC 3.33x 3 → 10 company-wide · 6 in C05D
#4 Innovations FOR World Nutrition, LLC 2.50x 2 → 5 company-wide · 5 in C05D
#5 Carbon Technology Holdings, LLC 2.33x 12 → 28 company-wide · 16 in C05D

C05D grants by year, peak 2020 (87)

US utility-patent grants per year in C05D, 2015–2025 - recent five years are up 10% versus 2015–2019.

Cool Planet Energy…

25
The Mosaic

18
Carbon Technology…

16
Yara International Asa

11
Profile Products L L C

9
Winfield Solutions

8
Ecovative Design

8
Earth Science…

8
York Potash

8
Verdesian Life…

7
Soilgenic

7
Harsco

7

What this shows Cool Planet Energy… is the most active filer in C05D, holding 25 of the 707 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 C05D
Rank	Company	Patents in C05D
#1	Cool Planet Energy System, Inc.	25
#2	The Mosaic Company	18
#3	Carbon Technology Holdings, LLC	16
#4	Yara International ASA	11
#5	Profile Products L.L.C.	9
#6	WinField Solutions, LLC	8
#7	Ecovative Design LLC	8
#8	Earth Science Laboratories, Inc.	8
#9	York Potash Ltd	8
#10	Verdesian Life Sciences U.S., LLC	7
#11	Soilgenic Technologies, LLC	7
#12	Harsco Corporation	7
#13	Specialty Granules Investments LLC	6
#14	LSC Environmental Products, LLC	6
#15	Ralco Nutrition, Inc.	6
#16	Nachurs Alpine Solutions, Corp.	6
#17	Talipot Cool Extract (IP), LLC	6
#18	K+S Aktiengesellschaft	5
#19	Sabic Agri-nutrients Company	5
#20	Innovations FOR World Nutrition, LLC	5

Footprint here vs. claim strategy

Each dot is a leading C05D 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 C05D assignees by class footprint. Bubble size = patents in C05D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near C05D's 707-grant footprint

Nationwide nearest neighbors for C05D (#499 of 670 by volume ; lead share 3.5%) - not the C05 parent-class siblings above.

Nearest by grant volume

C23G 703 A24C 702 B09C 712 C21B 713

Nearest by lead-assignee share

E05Y 3.5% E06B 3.5% A61B 3.5% C01F 3.6%

Questions about C05D

Which company holds the most patents in C05D?

Cool Planet Energy System, Inc. leads C05D with 25 patents (3.5% of the subclass). By PatentsView assignee type, us corporations account for 70% of class grants.

Which C05D assignees grew fastest recently?

Among assignees with ≥5 grants in C05D, Soilgenic Technologies, LLC shows the highest company-wide grant multiple (14x: 0 grants in 2019–2021 → 14 in 2022–2024) while holding 7 patents in this subclass. Growth is company-wide, not class-only.

How does C05D compare inside parent class C05?

Inside C05 (FERTILISERS; Manufacture Thereof), C05D ranks #4 of 5 subclasses by grant volume and holds 16.3% of the parent class total. The largest sibling is C05G (1,232 grants).

What to do with this data

C05D in context - here's where to go next.

Cool Planet Energy System, Inc. leads C05D with 25 grants in this class. See full portfolio
C05D ranks #499 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class C05, the largest sibling subclass is C05G with 1,232 grants. Explore C05G

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

Methodology - C05D figures are USPTO PatentsView granted-utility totals for this subclass (707 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.