US4282121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient starch graft polymer polyhydric alcohol product
Assignee: VARIED INVESTMENTS Inc
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Filing: 1979-10-09
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Granted: 1981-08-04
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Expires: 1999-10-09
Abstract
Abstract A starch-hydrolyzed polyacrylonitrile graft copolymer dispersed in polyhydric alcohols such as glycerol combines to form a resilient, soft, shock absorbent type material after heating. The material is useful for seat pads, artificial limb pads, toys and other applications where resilient, soft, shock absorbent materials find utility.
Inventors
- 👤 Phillip W. Goodrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
A composition comprising the reaction product at temperatures of about 23° C. to 120° C. of a starch-hydrolyzed polyacrylonitrile graft copolymer and a sugar alcohol having the general formula HOCH 2 (CHOH) n CH 2 OH where n is 2-5 and wherein, based on the total weight of starch graft polymer and sugar alcohol, said starch graft polymer is present in an amount of about 5-60% by weight and said sugar alcohol is present in an amount of about 95-40% by weight.
Claim 2
Dependent Claim
82 words
A composition comprising the reaction product at temperatures of about 23° C. to 120° C. of a starch-hydrolyzed polyacrylonitrile graft copolymer and a sugar alcohol having the general formula HOCH 2 (CHOH) n CH 2 OH where n is 2-5 and wherein, based on the total weight of starch graft polymer and sugar alcohol, said starch graft polymer is present in an amount of about 5-60% by weight and said sugar alcohol is present in an amount of about 95-40% by weight.
Claim 3
Dependent Claim
21 words
A composition as defined in claim 1 in which said starch graft polymer is present in an amount of about 20%.
Claim 4
Dependent Claim
25 words
A composition as defined in claim 1 in which said sugar alcohol is selected from the group consisting of glycerol, erythritol, xylitol, sorbitol and mannitol.
Claim 5
Dependent Claim
14 words
A composition as defined in claim 1 in which said sugar alcohol is glycerol.
References Cited (Backward Citations)
US4072640A
Cited
US4172058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |