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Patent US3384611A successfully refreshed from Google Patents.
US3384611A
Expired / Lapsed
US
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Modified triphosphonitrilic polymer compositions
Assignee: WR Grace and Co
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Filing: 1964-09-01
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Granted: 1968-05-21
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Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Grushkin Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:37
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/025; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/3889
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |