Patent US3087919A successfully refreshed from Google Patents.
US3087919A
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US
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Process for polymerizing methacrylonitrile
Assignee: EIDP Inc
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Filing: 1958-05-27
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Granted: 1963-04-30
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Expires: 1978-05-27
Abstract
No abstract record available.
Inventors
- 👤 Wilkinson William Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:20
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2377779A
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US2412034A
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US2439528A
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US2448976A
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US2608555A
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US2685575A
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US2841574A
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US2842474A
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US2977337A
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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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |