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US3382214A
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Vinyl pyridine copolymers comprising segments having hydroxy substituents thereon and a process for their preparation
Assignee: Polaroid Corp
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Filing: 1964-11-18
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Granted: 1968-05-07
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Expires: 1984-11-18
Abstract
No abstract record available.
Inventors
- 👤 Howard C Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:32
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/08; C08F8/00; C08F8/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2888436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |