Patent US3598623A successfully refreshed from Google Patents.
US3598623A
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US
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Carboxyl starch amine ethers and paper coating compositions containing same
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1968-04-24
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Granted: 1971-08-10
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Expires: 1988-04-24
Abstract
Abstract CARBOXYL STARCH AMINE ETHERS HAVING AN ANIONIC SUBSTITUENT-TO-AMINE-ETHER SUBSTITUENT MOLAR RATIO OF AT LEAST 1:1 AND PAPER COATING COLORS CONTAINING THE CARBOXYL STARCH AMINE ETHERS AS HIGH-STRENGTH BINDERS, ESPECIALLY FOR LOW WEIGHT PUBLICATION-GRADE PAPER.
Inventors
- 👤 Robert M Powers
- 👤 Roland W Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:44
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/54; C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |