US3367993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate elastomers from 5, 6, 7, 8-tetrahydro-1, 4-naphthalenediols
Assignee: Eastman Kodak Co
•
Filing: 1965-08-09
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Granted: 1968-02-06
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Expires: 1985-08-09
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Jr Winston J Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3287442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |