US3409704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate compositions
Assignee: Bayer Corp
•
Filing: 1964-10-16
•
Granted: 1968-11-05
•
Expires: 1984-10-16
Abstract
No abstract record available.
Inventors
- 👤 John V Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:16
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G63/78; C08G63/82; C08G63/87
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2922779A
Cited
US3169121A
Cited
US3110698A
Cited
US3148985A
Cited
FR1287519A
Cited
US3282893A
Cited
US3265762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |