Patent US3385719A successfully refreshed from Google Patents.
US3385719A
Expired / Lapsed
US
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Process for production of an alkali starch xanthate solution
Assignee: United States Department of Agriculture
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Filing: 1965-02-25
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Granted: 1968-05-28
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Expires: 1985-02-25
Abstract
No abstract record available.
Inventors
- 👤 Earl B Lancaster
- 👤 Howard F Conway
- 👤 Laurence A Weinecke
- 👤 Jr Edward L Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:21
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; C; C08; C08B; C08B31/00; C08B31/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3160552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |