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IPC Subgroup
C14C 3/28

Multi-step processes

Introduced: September 1968

Last revised: January 2006

Full Title

Tanning; Compositions for tanning > Chemical tanning > Multi-step processes

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
SKINS; HIDES; PELTS OR LEATHER
Subclass:
TREATING SKINS, HIDES OR LEATHER WITH CHEMICALS, ENZYMES OR MICROORGANISMS, e.g. TANNING, IMPREGNATING OR FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING

Filing statistics

IPC C14C 3/28 belongs to the parent subclass C14C, which recorded 7,208 patent applications worldwide between 2013 and 2023. Annual filings grew from 411 in 2013 to 563 in 2023 (+37%), peaking at 867 applications in 2018. The most active applicants in class C14 are SHAANXI UNIVERSITY OF SCIENCE AND TECHNOLOGY (236 applications), SICHUAN UNIVERSITY (186 applications) and XINGYE LEATHER TECHNOLOGY COMPANY (118 applications).

Source: EPO PATSTAT, worldwide filings

Top Applicants

Top 10 applicants by patent filingsfor class C14, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SHAANXI UNIVERSITY OF SCIENCE AND TECHNOLOGY 236
  2. SICHUAN UNIVERSITY 186
  3. XINGYE LEATHER TECHNOLOGY COMPANY 118
  4. NANTONG SIRUI ENGINEERING COMPANY 104
  5. HENAN PROSPER SKINS & LEATHER ENTERPRISE COMPANY 93
  6. LIAONING FUXIN NEW MATERIAL COMPANY 90
  7. FENGAN LEATHER COMPANY 70
  8. ZHANGZHOU XIANGZHOU LEATHER COMPANY 70
  9. STAHL INTERNATIONAL NL 68
  10. ZHEJIANG FUBANG GROUP COMPANY 61