A61F 13/534
Having an inhomogeneous composition through the thickness of the pad
Official title: having an inhomogeneous composition through the thickness of the pad (A61F13/538, A61F13/539 take precedence)
A61F13/534 (Having an inhomogeneous composition through the thickness of the pad) appears on 2,331 US grants and 2,156 published applications in this corpus.
Search patents in A61F- Granted patents
- 2,331
- Published applications
- 2,156
- Assignees
- 411
- Inventors
- 3,548
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 26 | 0 |
| 1978 | 17 | 0 |
| 1979 | 9 | 0 |
| 1980 | 21 | 0 |
| 1981 | 23 | 0 |
| 1982 | 29 | 0 |
| 1983 | 18 | 0 |
| 1984 | 19 | 0 |
| 1985 | 39 | 0 |
| 1986 | 35 | 0 |
| 1987 | 47 | 0 |
| 1988 | 37 | 0 |
| 1989 | 31 | 0 |
| 1990 | 29 | 0 |
| 1991 | 37 | 0 |
| 1992 | 27 | 0 |
| 1993 | 40 | 0 |
| 1994 | 49 | 0 |
| 1995 | 50 | 0 |
| 1996 | 64 | 0 |
| 1997 | 68 | 0 |
| 1998 | 75 | 0 |
| 1999 | 57 | 0 |
| 2000 | 42 | 0 |
| 2001 | 48 | 25 |
| 2002 | 68 | 62 |
| 2003 | 90 | 123 |
| 2004 | 49 | 113 |
| 2005 | 33 | 90 |
| 2006 | 37 | 71 |
| 2007 | 23 | 60 |
| 2008 | 25 | 53 |
| 2009 | 29 | 33 |
| 2010 | 48 | 40 |
| 2011 | 32 | 49 |
| 2012 | 39 | 79 |
| 2013 | 43 | 83 |
| 2014 | 51 | 69 |
| 2015 | 56 | 131 |
| 2016 | 65 | 101 |
| 2017 | 64 | 126 |
| 2018 | 50 | 99 |
| 2019 | 68 | 121 |
| 2020 | 80 | 132 |
| 2021 | 99 | 94 |
| 2022 | 67 | 105 |
| 2023 | 57 | 84 |
| 2024 | 77 | 80 |
| 2025 | 70 | 79 |
| 2026 | 54 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A61F 13/537Characterised by a layer facilitating or inhibiting flow in one direction or1,284
- A61F 13/535Inhomogeneous in the plane of the pad747
- A61F 2013/53445From several sheetsIndexing code422
- A61F 13/53409Having a folded core214
- A61F 2013/5349Being a tissue-wrapped coreIndexing code68
- A61F 2013/53463With a reinforcing structureIndexing code63
- A61F 2013/53481Being biodegradableIndexing code23
- A61F 2013/53454With mirror-like structureIndexing code12
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Most cited
By later US patents
- Device for treating tissues, for example skin1,592US 4,382,441 A1983
- Process for making a soft, strong, absorbent material for use in absorbent articles1,412US 6,485,667 B1Rayonier Products and Financial Services Company · 2002
- Wound dressing with conformable elastomeric wound contact layer1,263US 5,445,604 ASmith and Nephew Associated Companies Limited · 1995
- Wound dressing1,191US 4,664,662 ASmith and Nephew Associated Companies Limited · 1987
- Absorbent article with dynamic elastic waist feature having a predisposed resilient flexural hinge1,158US 5,151,092 AThe Procter & Gamble Company · 1992