Patent US5811122A successfully refreshed from Google Patents.
US5811122A
Expired / Lapsed
US
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Hide/polymer and leather/polymer composite materials formed by in situ polymerization of polymer precursors impregnated into hide and leather
Assignee: Kansas State University
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Filing: 1996-11-26
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Granted: 1998-09-22
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Expires: 2016-11-26
Abstract
Abstract Hide/leather-polymer composite materials are provided by the impregnation of polymer systems into interstitial void spaces in the collagen fiber network of the hide/leather precursors, providing a broad spectrum of composite materials possessing a wide variety of bulk mechanical properties. Preferably, the polymer systems employed in the inventive composites are bismaleimides, when high modulus, strength and flexural modulus are desired, and siloxane-based polymers, when elastomeric bulk properties are desired.
Inventors
- 👤 John R. Schlup
- 👤 L. T. Fan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:16
CPC Classifications
C; C14; C14C; C14C9/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/4935
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
72 words
A polymer hide/leather composite comprising an animal hide or leather, said hide or leather presenting in its unimpregnated state a network of fibers, said fibers separated by initial interstitial void spaces, said hide/leather composite being substantially fully impregnated with a quantity of polymer interspersed within said void spaces and forming therein a polymer matrix within said fiber network, said polymer matrix comprising at least about 10% by weight of said hide/leather composite.
Claim 2
Dependent Claim
72 words
A polymer hide/leather composite comprising an animal hide or leather, said hide or leather presenting in its unimpregnated state a network of fibers, said fibers separated by initial interstitial void spaces, said hide/leather composite being substantially fully impregnated with a quantity of polymer interspersed within said void spaces and forming therein a polymer matrix within said fiber network, said polymer matrix comprising at least about 10% by weight of said hide/leather composite.
Claim 3
Dependent Claim
9 words
The composite of claim 1, said polymer being DMS-bis-benzene.
Claim 4
Dependent Claim
15 words
The composite of claim 2, said composite having the Young's modulus greater than 240 MPa.
Claim 5
Dependent Claim
15 words
The composite of claim 2, said composite having the tensile strength greater than 19 MPa.
Claim 6
Dependent Claim
15 words
The composite of claim 2, said composite having the breaking strength greater than 19 MPa.
Claim 7
Dependent Claim
9 words
The composite of claim 1, said polymer being siloxane-urea.
Claim 8
Dependent Claim
9 words
The composite of claim 1, said polymer being bismaleimide-DDM.
Claim 9
Dependent Claim
15 words
The composite of claim 7, said composite having a Young's modulus greater than 2500 MPa.
Claim 10
Dependent Claim
15 words
The composite of claim 2, said composite having a tensile strength greater than 19 MPa.
Claim 11
Dependent Claim
15 words
The composite of claim 2, said composite having a breaking strength greater than 16 MPa.
Claim 12
Dependent Claim
9 words
The composite of claim 7, said polymer being bismaleimide-Jeffamine.
Claim 13
Dependent Claim
22 words
The composite of claim 1, said composite impregnated void space being greater than 90% of total void space existing in unimpregnated hide/leather.
Claim 14
Dependent Claim
17 words
The composite of claim 1, said matrix comprising from about 10-50% by weight of said hide/leather composite.
Claim 15
Dependent Claim
17 words
The composite of claim 13, said matrix comprising from about 15-40% by weight of said hide/leather composite.
Claim 16
Dependent Claim
80 words
A polymer hide/leather composite comprising an animal hide or leather, said hide or leather presenting a network of fibers, said fibers separated by interstitial void spaces, said hide/leather being substantially fully impregnated with a quantity of polymer interspersed within said void spaces and forming therein a polymer matrix within said fiber network, said polymer being selected from the group consisting of DMS-bis-benzene, siloxane-urea and bismaleimide-Jeffamine, and said polymer matrix comprising at least about 10% by weight of said hide/leather composite.
Claim 17
Dependent Claim
80 words
A polymer hide/leather composite comprising an animal hide or leather, said hide or leather presenting a network of fibers, said fibers separated by interstitial void spaces, said hide/leather being substantially fully impregnated with a quantity of polymer interspersed within said void spaces and forming therein a polymer matrix within said fiber network, said polymer being selected from the group consisting of DMS-bis-benzene, siloxane-urea and bismaleimide-Jeffamine, and said polymer matrix comprising at least about 10% by weight of said hide/leather composite.
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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) | 2001-09-21 | 2002-03-23 | 2002-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-21 | 2006-03-23 | 2006-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-21 | 2010-03-23 | 2010-09-22 | $7700.00 | Window Closed / Lapsed |