A61F 13/511 Topsheet, i.e. the permeable cover or layer facing the skin
Introduced: January 2000
Full Title
Full titles differ between systems:
Bandages or dressings; Absorbent pads > Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators > characterised by the outer layers of the pads > Topsheet, i.e. the permeable cover or layer facing the skin
Bandages or dressings (radioactive dressings ); Absorbent pads > Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators > characterised by the outer layers of the pads (A61F13/20 takes precedence) > Topsheet, i.e. the permeable cover or layer facing the skin
CPC subdivides this area 4x more granularly than IPC with 5 additional codes.
5 codes are CPC-only extensions.
IPC defines codes here since 2000.
Child Classifications
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- A61F 13/512 characterised by its apertures, e.g. perforations since 2000 +5 CPC IPC+CPC Available in IPC and CPC
- A61F 13/513 having areas of different permeability since 2000 +10 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class A61,2013–2023, worldwide · Source: EPO PATSTAT
- PHILIPS ELECTRONICS NL 18,523
- NOVARTIS CH 14,253
- COVIDIEN US 13,953
- ROCHE CH 12,005
- CHINESE ACADEMY OF SCIENCES 11,955
- UNIVERSITY OF CALIFORNIA US 11,692
- HARVARD UNIVERSITY US 11,596
- L'OREAL FR 11,593
- P&G (PROCTER & GAMBLE COMPANY) US 11,297
- OLYMPUS CORPORATION JP 9,594
Top Applicants (CPC)
Class A61,2013–2023, worldwide · Source: EPO PATSTAT
- PHILIPS ELECTRONICS NL 20,621
- NOVARTIS CH 15,792
- ROCHE CH 14,303
- COVIDIEN US 13,862
- HARVARD UNIVERSITY US 13,454
- UNIVERSITY OF CALIFORNIA US 12,798
- P&G (PROCTER & GAMBLE COMPANY) US 12,140
- L'OREAL FR 11,800
- OLYMPUS CORPORATION JP 9,894
- BOSTON SCIENTIFIC SCIMED US 9,513