Patent US3390100A successfully refreshed from Google Patents.
US3390100A
Expired / Lapsed
US
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Process for the preparation of extrudates from hydrogels
Assignee: Wyeth Holdings LLC
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Filing: 1964-02-14
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Granted: 1968-06-25
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Expires: 1984-02-14
Abstract
No abstract record available.
Inventors
- 👤 Chomitz Nicholas
- 👤 Sanborn William Engene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:45
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/03; B01J37/036; B01J2/00; B01J2/20; B01J23/00; B01J23/70; B01J27/00; B01J27/06; B01J27/128; B01J27/13; B01J37/0009; B01J37/0201
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2773843A
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US2921033A
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US2879546A
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US2950169A
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US3032514A
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US3004029A
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US3020243A
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US3265793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |