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CPC technology class · C07

C07G - Compounds OF Unknown Constitution

Compounds of unknown constitution. 358 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

358
US patents granted
C07
Parent CPC class
20
Active assignees
-11%
5-yr velocity

The verdict

Compounds OF Unknown Constitution ranks #571 of 670 CPC technology areas - 358 US patents granted since 2015, with filing down 11% over five years.

#571
of 670 CPC technology areas
358
US patents granted, 2015–2025
Upm-kymmene
leading assignee (22)
-11%
filing velocity, last 5 yrs
Top assignee: Upm-kymmene Corporation (22 patents)

CPC subclass C07G - COMPOUNDS OF UNKNOWN CONSTITUTION - covers 358 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class C07 (ORGANIC CHEMISTRY). See our CPC classification guide for how the system works.

The competitive landscape in C07G is shaped by 20 distinct companies actively filing in this space. Upm-kymmene Corporation leads with 22 patents, followed by Virdia, Llc at 12 grants and Renmatix, Inc. at 11.

Filing activity in C07G is down 11% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is C07G innovation accelerating?

US utility-patent grants per year in C07G, 2015–2025 - recent five years are down 11% versus 2015–2019.

1020304050 20152016201720182019202020212022202320242025 26

Who leads C07G?

The 12 most active assignees in COMPOUNDS OF UNKNOWN CONSTITUTION - wider bars mean more grants

patents

What this shows Upm-kymmene is the most active filer in C07G, holding 22 of the 358 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 C07G
Rank Company Patents in C07G
#1 Upm-kymmene Corporation 22
#2 Virdia, Llc 12
#3 Renmatix, Inc. 11
#4 Fibria Innovations Inc. 9
#5 Fpinnovations 6
#6 REN FUEL K2B AB 6
#7 API Intellectual Property Holdings, Llc 5
#8 Valmet AB 4
#9 Zainar, Inc. 4
#10 Granbio Intellectual Property Holdings, Llc 4
#11 Annikki Gmbh 4
#12 Flotek Chemistry, Llc 3
#13 Rockwool A/s 3
#14 Compagnie Industrielle De La Matiere Vegetale—cimv 3
#15 Cmblu Energy Ag 3
#16 Green Extraction Technologies 3
#17 Chevron Oronite Company Llc 2
#18 Ip2ipo Innovations Limited 2
#19 Graftech International Holdings Inc. 2
#20 Deinove 2

About This Class

CPC subclass C07G belongs to class C07.

358 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 C07G 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 C07G assignees by class footprint. Bubble size = patents in C07G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 C07G assignees by class footprint. Bubble size = patents in C07G. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 10152025 0510152025 Patents in C07G Avg claims / patent (company-wide) Upm-kymmeneVirdiaRenmatixFibria InnovationsFpinnovationsRen Fuel K2b AbApi Intellectual Prop…Valmet AbZainarGranbio Intellectual…AnnikkiFlotek ChemistryRockwool A/SCompagnie Industriell…
Top 14 C07G assignees by class footprint. Bubble size = patents in C07G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class C07G?
CPC subclass C07G covers COMPOUNDS OF UNKNOWN CONSTITUTION. It belongs to CPC class C07 (ORGANIC CHEMISTRY), with 358 US utility patents granted since 2015.
How many patents have been filed in C07G?
358 US utility patents were granted in CPC subclass C07G between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in C07G?
Upm-kymmene Corporation leads C07G with 22 patents, making it the most active assignee in this technology area.
How is patent data for C07G 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., C07) is a broad technology category. Subclasses like C07G 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.