US3461097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonates of the bisphenol of dicyclopentadiene
Assignee: Union Carbide Corp
•
Filing: 1967-02-16
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Granted: 1969-08-12
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 Robert J Cotter
- 👤 Francis N Apel
- 👤 Louis B Conte Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:59
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08L; C08L75/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3317466A
Cited
US3347935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |