US3499876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel anhydride interpolymers
Assignee: GAF Corp
•
Filing: 1967-04-21
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Granted: 1970-03-10
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Expires: 1987-04-21
Abstract
No abstract record available.
Inventors
- 👤 Nathan D Field
- 👤 Earl P Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:22
CPC Classifications
C; C08; C08F; C08F16/00; C08F16/12; C08F22/00; C08F22/04; C08F8/00; C08F2800/00; C08F2800/10; C08F2800/20
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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |