PlainPatent

CPC technology class · D01

D01F - Chemical Features IN THE Manufacture OF Artificial Filaments

Chemical features in the manufacture of artificial filaments, threads, fibres, bristles or ribbons; apparatus specially adapted for the manufacture of carbon filaments. 3,867 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

3,867
US patents granted
D01
Parent CPC class
20
Active assignees
+37%
5-yr velocity

The verdict

Chemical Features IN THE Manufacture OF Artificial Filaments ranks #277 of 670 CPC technology areas - 3,867 US patents granted since 2015, with filing up 37% over five years.

#277
of 670 CPC technology areas
3,867
US patents granted, 2015–2025
The Procter & Gamble
leading assignee (128)
+37%
filing velocity, last 5 yrs
Top assignee: The Procter & Gamble Company (128 patents)

CPC subclass D01F - CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS - covers 3,867 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class D01 (NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING). See our CPC classification guide for how the system works.

The competitive landscape in D01F is shaped by 20 distinct companies actively filing in this space. The Procter & Gamble Company leads with 128 patents, followed by Lenzing Aktiengesellschaft at 43 grants and Aladdin Manufacturing Corporation at 42.

Filing activity in D01F is up 37% 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 D01F innovation accelerating?

US utility-patent grants per year in D01F, 2015–2025 - recent five years are up 37% versus 2015–2019.

200250300350400450 20152016201720182019202020212022202320242025 255

Who leads D01F?

The 12 most active assignees in CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS - wider bars mean more grants

patents

What this shows The Procter & Gamble is the most active filer in D01F, holding 128 of the 3,867 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 D01F
Rank Company Patents in D01F
#1 Toray Industries, Inc. 102
#2 Lenzing Aktiengesellschaft 43
#3 Aladdin Manufacturing Corporation 42
#4 Kolon Industries, Inc. 36
#5 Jiangsu Hengli Chemical Fibre Co., Ltd. 31
#6 Kimberly-clark Worldwide, Inc. 30
#7 Teijin Limited 26
#8 Taiwan Textile Research Institute 23
#9 Tepha, Inc. 19
#10 ES Fibervisions Co., Ltd. 18
#11 Spiber Inc. 17
#12 Carbon Holdings Intellectual Properties, Llc 16
#13 Acelon Chemicals AND Fiber Corporation 16
#14 Nippon Paper Industries Co., Ltd. 15
#15 C2cnt Llc 15
#16 Cytec Industries, Inc. 14
#17 Polytex Sportbeläge Produktions-gmbh 14
#18 Donaldson Company, Inc. 13
#19 Invista North America S.a.r.l. 13
#20 Dupont Safety & Construction, Inc. 13

About This Class

CPC subclass D01F belongs to class D01.

3,867 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 D01F 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 D01F assignees by class footprint. Bubble size = patents in D01F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 D01F assignees by class footprint. Bubble size = patents in D01F. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 5101520 020406080100120 Patents in D01F Avg claims / patent (company-wide) Toray IndustriesLenzing Aktiengesells…Aladdin ManufacturingKolon IndustriesJiangsu Hengli Chemic…Kimberly-clark Worldw…TeijinTaiwan Textile Resear…TephaEs FibervisionsSpiberCarbon Holdings Intel…Acelon Chemicals And…Nippon Paper Industri…
Top 14 D01F assignees by class footprint. Bubble size = patents in D01F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class D01F?
CPC subclass D01F covers CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS. It belongs to CPC class D01 (NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING), with 3,867 US utility patents granted since 2015.
How many patents have been filed in D01F?
3,867 US utility patents were granted in CPC subclass D01F between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in D01F?
The Procter & Gamble Company leads D01F with 128 patents, making it the most active assignee in this technology area.
How is patent data for D01F 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., D01) is a broad technology category. Subclasses like D01F 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.