having an inhomogeneous composition through the thickness of the pad (A61F13/538, A61F13/539 take precedence)

Introduced: January 2000

Title

Titles differ between systems:

IPC: having an inhomogeneous composition through the thickness of the pad

CPC: having an inhomogeneous composition through the thickness of the pad (A61F13/538, A61F13/539 take precedence)

Full Title

Full titles differ between systems:

IPC:

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 absorbing medium > having an inhomogeneous composition through the thickness of the pad

CPC:

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 absorbing medium (A61F13/20 takes precedence) > having an inhomogeneous composition through the thickness of the pad (A61F13/538, A61F13/539 take precedence)

Additional Content IPC

Absorbent pads characterised by specific fibre orientation or weave Absorbent pads characterised by the connection of absorbent layers with each other or with the outer layers

CPC subdivides this area 4x more granularly than IPC with 6 additional codes.

6 codes are CPC-only extensions.

Note: 5 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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A61F 13/53409 +3 CPC CPC only CPC only
A61F 13/535 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes ( A61F13/537 take precedence) since 2000 +1 CPC IPC+CPC Available in IPC and CPC
A61F 13/537 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer since 2000 +7 CPC IPC+CPC Available in IPC and CPC
A61F 2013/53445 2nd only CPC only CPC only
A61F 2013/53454 2nd only CPC only CPC only
A61F 2013/53463 2nd only +1 CPC CPC only CPC only
A61F 2013/53481 2nd only CPC only CPC only
A61F 2013/5349 2nd only CPC only CPC only

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