Patent US4772281A successfully refreshed from Google Patents.
US4772281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Patient underpad
Assignee: Individual
•
Filing: 1986-10-24
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Granted: 1988-09-20
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Expires: 2006-10-24
Abstract
Abstract An absorbent re-usable patient underpad is formed of five layers of fabric consisting from top to bottom of: an absorbent rayon-polyester blend, non-woven polyester; vinyl; and polyester, a synthetic taffeta. The third, fourth and fifth layers are bonded together as are, generally, the first and second layers.
Inventors
- 👤 Kenneth W. Armstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:24
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/48; A61F5/485; A61F13/00; A61F13/15; A61F13/15203; A61F13/15268; A61F13/53; A61F13/534; A61F2013/53445; A61F13/539; A61F2013/53966
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
A re-usable patient underpad comprising: (a) a top layer of polyester fabric; (b) a second absorbent layer of a rayon-polyester blend fabric below and bonded to said top layer; (c) a third layer of non-woven polyester fabric; (d) a fourth layer of water impervious vinyl fabric below, and bonded to said third layer; (e) a fifth and bottom layer of washable synthetic fabric having a smooth bottom surface, said fifth layer below and bonded to said fourth layer; where said five fabric layers are joined together around their outside edges.
Claim 2
Dependent Claim
90 words
A re-usable patient underpad comprising: (a) a top layer of polyester fabric; (b) a second absorbent layer of a rayon-polyester blend fabric below and bonded to said top layer; (c) a third layer of non-woven polyester fabric; (d) a fourth layer of water impervious vinyl fabric below, and bonded to said third layer; (e) a fifth and bottom layer of washable synthetic fabric having a smooth bottom surface, said fifth layer below and bonded to said fourth layer; where said five fabric layers are joined together around their outside edges.
Claim 3
Dependent Claim
14 words
The underpad of claim 1, where said top layer of fabric is woven polyester.
Claim 4
Dependent Claim
15 words
The underpad of claim 1 where said top layer of fabric is polyester tricot mesh.
Claim 5
Dependent Claim
92 words
A re-usable patient underpad comprising: (a) a top layer of synthetic sheepskin fabric of blended polyester and acrylic; (b) a second absorbent layer of rayon-polyester blend fabric, below said top layer; (c) a third layer of non-woven polyester fabric; (d) a fourth layer of water impervious vinyl fabric, below and bonded to said third layer; (e) a fifth and bottom layer of washable synthetic fabric having a smooth bottom surface, said fifth layer below and bonded to said fourth layer; where said five fabric layers are joined together around their outside edges.
Claim 6
Dependent Claim
92 words
A re-usable patient underpad comprising: (a) a top layer of synthetic sheepskin fabric of blended polyester and acrylic; (b) a second absorbent layer of rayon-polyester blend fabric, below said top layer; (c) a third layer of non-woven polyester fabric; (d) a fourth layer of water impervious vinyl fabric, below and bonded to said third layer; (e) a fifth and bottom layer of washable synthetic fabric having a smooth bottom surface, said fifth layer below and bonded to said fourth layer; where said five fabric layers are joined together around their outside edges.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |