A61F 13/531
Having a homogeneous composition through the thickness of the pad
Official title: having a homogeneous composition through the thickness of the pad (A61F13/538, A61F13/539 take precedence)
A61F13/531 (Having a homogeneous composition through the thickness of the pad) appears on 1,210 US grants and 1,292 published applications in this corpus.
Search patents in A61F- Granted patents
- 1,210
- Published applications
- 1,292
- Assignees
- 201
- Inventors
- 1,888
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 7 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 10 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 7 | 0 |
| 1986 | 3 | 0 |
| 1987 | 9 | 0 |
| 1988 | 11 | 0 |
| 1989 | 10 | 0 |
| 1990 | 9 | 0 |
| 1991 | 10 | 0 |
| 1992 | 16 | 0 |
| 1993 | 8 | 0 |
| 1994 | 27 | 0 |
| 1995 | 27 | 0 |
| 1996 | 31 | 0 |
| 1997 | 33 | 0 |
| 1998 | 38 | 0 |
| 1999 | 36 | 0 |
| 2000 | 21 | 0 |
| 2001 | 20 | 10 |
| 2002 | 55 | 47 |
| 2003 | 42 | 80 |
| 2004 | 38 | 57 |
| 2005 | 23 | 52 |
| 2006 | 11 | 60 |
| 2007 | 19 | 46 |
| 2008 | 13 | 32 |
| 2009 | 16 | 22 |
| 2010 | 32 | 47 |
| 2011 | 20 | 28 |
| 2012 | 34 | 49 |
| 2013 | 29 | 46 |
| 2014 | 36 | 49 |
| 2015 | 40 | 85 |
| 2016 | 33 | 64 |
| 2017 | 55 | 69 |
| 2018 | 34 | 59 |
| 2019 | 39 | 73 |
| 2020 | 51 | 82 |
| 2021 | 68 | 51 |
| 2022 | 43 | 48 |
| 2023 | 27 | 39 |
| 2024 | 39 | 47 |
| 2025 | 32 | 33 |
| 2026 | 24 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Absorbent article with improved capillary acceleration sheet6 Oct 2026US 12,751,869 B2Drylock Technologies NV
- Absorbent body for use in an absorbent article18 Aug 2026US 12,708,570 B2Kimberly-Clark Worldwide, Inc.
- Absorbent structure for sanitary articles and method for its production11 Aug 2026US 12,702,596 B2Fameccanica. Data S.p.A.
- Absorbent article with reduced absorbent core7 Jul 2026US 12,672,988 B2Drylock Technologies NV
- Absorbent composite, an absorbent article employing the same, and methods, systems, and apparatus for making the absorbent composite and/or article23 Jun 2026US 12,661,278 B2DSG Technology Holdings Ltd.
- Method for manufacturing absorbent body3 Sep 2026US 2026/0256628 A1Zuiko Corporation
- Liquid-absorbing perforated product and hygienic article3 Sep 2026US 2026/0256632 A1King's Choice (Jiangsu) New Material Co., Ltd.
- Absorbent article27 Aug 2026US 2026/0248662 A1Sumitomo Seika Chemicals Co., Ltd.
- Absorbent article20 Aug 2026US 2026/0240694 A1The Procter & Gamble Company
- Absorbent article having flex bond channel regions20 Aug 2026US 2026/0240695 A1The Procter & Gamble Company
Most cited
By later US patents
- Hydrophilic polypropylene fibers having antimicrobial activity1,367US 6,762,339 B13M Innovative Properties Company · 2004
- High density absorbent members having lower density and lower basis weight acquisition zones1,072US 4,834,735 AThe Proctor & Gamble Company · 1989
- High efficiency absorbent articles for incontinence management776US 5,147,345 AThe Procter & Gamble Company · 1992
- Absorbent foam materials for aqueous body fluids and absorbent articles containing such materials745US 5,260,345 AThe Procter & Gamble Company · 1993
- Resilient plastic web exhibiting fiber-like properties732US 4,342,314 AThe Procter & Gamble Company · 1982