Patent US4420576A successfully refreshed from Google Patents.
US4420576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastics based composition containing a polyester resin and alkaline modified starch granules
Assignee: Coloroll Ltd
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Filing: 1981-07-29
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Granted: 1983-12-13
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Expires: 2001-07-29
Abstract
Abstract A plastics-based composition comprising a polyester resin and starch granules which, prior to mixing with the resin, are rendered reactive with the resin by a surface implant of alkali metal or alkaline earth metal ions.
Inventors
- 👤 Gerald J. L. Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:14
CPC Classifications
C; C08; C08G; C08G81/00; C08B; C08B31/00; C08L; C08L101/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
35 words
A plastics-based composition comprising a polyester resin and starch granules which, prior to mixing with the resin, are rendered reactive with the resin by a surface implant of alkali metal or alkaline earth metal ions.
Claim 2
Dependent Claim
35 words
A plastics-based composition comprising a polyester resin and starch granules which, prior to mixing with the resin, are rendered reactive with the resin by a surface implant of alkali metal or alkaline earth metal ions.
Claim 3
Dependent Claim
23 words
A composition according to claim 1 wherein the starch granules are washed with sodium hydroxide solutions and then mixed with a polyester resin.
References Cited (Backward Citations)
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US3276899A
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US4021388A
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US4082903A
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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) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |