US3285875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable and cured high molecular weight polycarbonates and process for the production thereof
Assignee: Bayer AG
•
Filing: 1960-01-12
•
Granted: 1966-11-15
•
Expires: 1980-01-12
Abstract
No abstract record available.
Inventors
- 👤 Bottenbruch Ludwig
- 👤 Schnell Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:02
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/40; C08G64/04; C08G64/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A CURABLE, LINEAR, HIGH MOLECULAR WEIGHT POLYCARBONATE HAVING A CHAIN STRUCTURE OF THE FORMULA
Claim 2
Dependent Claim
14 words
A CURABLE, LINEAR, HIGH MOLECULAR WEIGHT POLYCARBONATE HAVING A CHAIN STRUCTURE OF THE FORMULA
References Cited (Backward Citations)
US2374949A
Cited
US2822404A
Cited
US2933520A
Cited
US2789966A
Cited
US2789967A
Cited
US2807653A
Cited
US2933521A
Cited
US2950266A
Cited
US3132118A
Cited
US3035091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |