PlainPatent

CPC technology class · D01

D01C - Chemical Or Biological Treatment Of Natural Filamentary O…

Chemical or biological treatment of natural filamentary or fibrous material to obtain filaments or fibres for spinning; carbonising rags to recover animal fibres. 69 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

69
US patents granted
#6/6
in D01
0.9%
D01 class share
+27%
5-yr velocity

The verdict

According to USPTO PatentsView, Chemical Or Biological Treatment Of Natural Filamentary O… ranks #633 of 670 CPC technology areas - 69 US patents granted since 2015, with recorded grant volume up 27% over five years.

#633
of 670 CPC technology areas
69
US patents granted, 2015–2025
Modern Meadow
leading assignee (9)
+27%
grant velocity, last 5 yrs

How D01C's grant cadence moved

Between 2020–2024, D01C recorded 33 grants versus 26 in 2015–2019 (+27% equal-window velocity). Across complete years, output peaked in 2019 at 10 grants and bottomed in 2016 at 2 (+400% peak-over-trough). Lead assignee Modern Meadow, Inc. holds 13.0% of the class ; the top three share 21.7%.

Leaderboard read

D01C concentration, lead at 13.0%

Modern Meadow, Inc. leads this historical grant record at 13.0% of D01C - us corporation assignees hold 80% of class grants (16 of 20). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
13.0%

9 of 69 grants

Top three share
21.7%

of the class's recorded grants

Lead over #2
5

more grants than Thomas Jefferson University

Where D01C sits inside D01

Among 6 subclasses in D01 (Natural OR Man-made Threads OR FIBRES; Spinning), D01C ranks #6 and holds 0.9% of the parent class's 7,563 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

D01F 3,867 D01D 2,869 D01H 375 D01G 292 D01B 91

Rising assignees active in D01C

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. #1 Modern Meadow, Inc. 1.50x 6 → 9 company-wide · 9 in D01C

D01C grants by year, peak 2019 (10)

US utility-patent grants per year in D01C, 2015–2025 - recent five years are up 27% versus 2015–2019.

024681012 20152016201720182019202020212022202320242025 5

Who leads D01C?

The 12 most active assignees in Chemical OR Biological Treatment OF Natural Filamentary OR Fibrous Material TO Obtain Filaments OR Fibres FOR SPINNING; Carbonising Rags TO Recover Animal Fibres - wider bars mean more grants

patents

What this shows Modern Meadow is the most active filer in D01C, holding 9 of the 69 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 D01C
Rank Company Patents in D01C
#1 Modern Meadow, Inc. 9
#2 Thomas Jefferson University 4
#3 National Agriculture AND Food Research Organization 2
#4 Allosource 1
#5 The American University in Cairo 1
#6 Mercer International Inc. 1
#7 Wuhan Textile University 1
#8 Avex, LLC 1

Footprint here vs. claim strategy

Each dot is a leading D01C 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 8 D01C assignees by class footprint. Bubble size = patents in D01C. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 8 data points (bubble-sized by third dimension). 510152025 0246810 Patents in D01C Avg claims / patent (company-wide) Modern MeadowThomas Jefferson…National Agriculture…AllosourceThe American…Mercer InternationalWuhan Textile…Avex
Top 8 D01C assignees by class footprint. Bubble size = patents in D01C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Questions about D01C

Which company holds the most patents in D01C?
Modern Meadow, Inc. leads D01C with 9 patents (13.0% of the subclass). By PatentsView assignee type, us corporations account for 80% of class grants.
Which D01C assignees grew fastest recently?
Among assignees with ≥5 grants in D01C, Modern Meadow, Inc. shows the highest company-wide grant multiple (1.50x: 6 grants in 2019–2021 → 9 in 2022–2024) while holding 9 patents in this subclass. Growth is company-wide, not class-only.
How does D01C compare inside parent class D01?
Inside D01 (Natural OR Man-made Threads OR FIBRES; Spinning), D01C ranks #6 of 6 subclasses by grant volume and holds 0.9% of the parent class total. The largest sibling is D01F (3,867 grants).

What to do with this data

D01C in context - here's where to go next.

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

Methodology - D01C figures are USPTO PatentsView granted-utility totals for this subclass (69 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.