US4021388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic resin sheet material
Assignee: Coloroll Ltd
•
Filing: 1976-03-10
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Granted: 1977-05-03
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Expires: 1996-03-10
Abstract
Abstract A biodegradable composition comprises a synthetic resin, a biodegradable granular filler such as natural starch and preferably a substance autoxidizable to yield a peroxide which attacks the carbon to carbon linkages in the resin.
Inventors
- 👤 Gerald Joseph Louis Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:01
CPC Classifications
C; C08; C08L; C08L3/00; C08L101/00; C08L75/00; C08L75/04; C08L75/06; C08L2201/00; C08L2201/06; Y; Y10; Y10S; Y10S260/00; Y10S260/43
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
47 words
A biodegradable composition including a polymer having carbon to carbon linkages and dispersed therein from 5.5% to 50% by weight of starch granules, the surface of said granules being modified by reaction with a compound which reacts with hydroxyl groups to form an ether or an ester.
Claim 2
Dependent Claim
47 words
A biodegradable composition including a polymer having carbon to carbon linkages and dispersed therein from 5.5% to 50% by weight of starch granules, the surface of said granules being modified by reaction with a compound which reacts with hydroxyl groups to form an ether or an ester.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein the said compound reacted with the said particle is an isocyanate.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein the said compound reacted with the said particles is a silicone.
Claim 5
Dependent Claim
46 words
The composition of claim 1 containing from 2% to 5.5% by weight of a substance which autoxidizes to generate a peroxide or a hydroperoxide, said substance being selected from the group consisting of a fatty acid, a fatty acid ester, a natural fat and mixtures thereof.
Claim 6
Dependent Claim
15 words
The composition of claim 1 wherein the synthetic resin is polystyrene, polyvinyl chloride or polyurethane.
References Cited (Backward Citations)
US3797690A
Cited
US3867324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |