DIFF Subgroup
D01D 1/06 Feeding liquid to the spinning head (constructions of pumps F04)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Feeding liquid to the spinning head
CPC: Feeding liquid to the spinning head (constructions of pumps F04)
Full Title
Full titles differ between systems:
IPC:
Treatment of filament-forming or like material > Feeding liquid to the spinning head
CPC:
Treatment of filament-forming or like material (working of plastics or substances in a plastic state, in general B29) > Feeding liquid to the spinning head (constructions of pumps F04)
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1980.
Child Classifications
Navigate with arrow keys, Enter to open
- D01D 1/09 Control of pressure, temperature or feeding rate since 1980 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class D01,2013–2023, worldwide · Source: EPO PATSTAT
- NATIONAL DONG HWA UNIVERSITY 1,242
- MASCHINENFABRIK RIETER CH 1,162
- TORAY INDUSTRIES JP 1,093
- TORAY INDUSTRIES 802
- JIANGNAN UNIVERSITY 771
- WUHAN TEXTILE UNIVERSITY 663
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 653
- CHINESE ACADEMY OF SCIENCES 559
- LENZING AT 525
- MURATA MACHINERY 492
Top Applicants (CPC)
Class D01,2013–2023, worldwide · Source: EPO PATSTAT
- TORAY INDUSTRIES JP 1,268
- MASCHINENFABRIK RIETER CH 1,200
- NATIONAL DONG HWA UNIVERSITY 955
- LENZING AT 602
- P&G (PROCTER & GAMBLE COMPANY) US 594
- WUHAN TEXTILE UNIVERSITY 494
- TRUETZSCHLER & COMPANY DE 453
- KOLON INDUSTRIES KR 433
- OERLIKON TEXTILE & COMPANY DE 430
- CHINESE ACADEMY OF SCIENCES 412