PlainPatent

CPC technology class · C10

C10C - Working-up Pitch

Working-up pitch, asphalt, bitumen, tar; pyroligneous acid. 264 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

264
US patents granted
C10
Parent CPC class
20
Active assignees
+35%
5-yr velocity

The verdict

Working-up Pitch ranks #590 of 670 CPC technology areas - 264 US patents granted since 2015, with filing up 35% over five years.

#590
of 670 CPC technology areas
264
US patents granted, 2015–2025
Mawetal
leading assignee (17)
+35%
filing velocity, last 5 yrs
Top assignee: Mawetal Llc (17 patents)

CPC subclass C10C - WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID - covers 264 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class C10 (PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT). See our CPC classification guide for how the system works.

The competitive landscape in C10C is shaped by 20 distinct companies actively filing in this space. Mawetal Llc leads with 17 patents, followed by Carbon Holdings Intellectual Properties, Llc at 14 grants and Total Marketing Services at 6.

Filing activity in C10C is up 35% 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 C10C innovation accelerating?

US utility-patent grants per year in C10C, 2015–2025 - recent five years are up 35% versus 2015–2019.

10203040 20152016201720182019202020212022202320242025 25

Who leads C10C?

The 12 most active assignees in WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID - wider bars mean more grants

patents

What this shows Mawetal is the most active filer in C10C, holding 17 of the 264 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 C10C
Rank Company Patents in C10C
#1 Mawetal Llc 17
#2 Carbon Holdings Intellectual Properties, Llc 14
#3 Total Marketing Services 6
#4 Cenovus Energy Inc. 6
#5 Ensyn Renewables, Inc. 5
#6 Building Materials Investment Corporation 4
#7 Inaeris Technologies, Llc 4
#8 Koppers Delaware, Inc. 4
#9 Graftech International Holdings Inc. 3
#10 Kior, Llc 3
#11 Soprema 3
#12 Texon Lp 3
#13 Blacklidge Emulsions, Inc. 3
#14 Suncor Energy Inc. 2
#15 Syncrude Canada Ltd. In Trust For The Owners Of The Syncrude Project As Such Owners Exist Now And In The Future 2
#16 Asphalt Sciences Llc 2
#17 Carbovate Development Corp. 2
#18 Sasol Technology Proprietary Limited 1
#19 Roadtec, Inc. 1
#20 Gala Industies, Inc. 1

About This Class

CPC subclass C10C belongs to class C10.

264 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 C10C 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 C10C assignees by class footprint. Bubble size = patents in C10C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 C10C assignees by class footprint. Bubble size = patents in C10C. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 010203040 05101520 Patents in C10C Avg claims / patent (company-wide) MawetalCarbon Holdings Intel…Total Marketing Servi…Cenovus EnergyEnsyn RenewablesBuilding Materials In…InaerisKoppers DelawareGraftech Internationa…KiorSopremaTexonBlacklidge EmulsionsSuncor Energy
Top 14 C10C assignees by class footprint. Bubble size = patents in C10C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class C10C?
CPC subclass C10C covers WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID. It belongs to CPC class C10 (PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT), with 264 US utility patents granted since 2015.
How many patents have been filed in C10C?
264 US utility patents were granted in CPC subclass C10C between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in C10C?
Mawetal Llc leads C10C with 17 patents, making it the most active assignee in this technology area.
How is patent data for C10C 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., C10) is a broad technology category. Subclasses like C10C 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.