US3535280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensing of polycarbonates in wiped thin-film reactor
Assignee: Bayer AG
•
Filing: 1968-07-18
•
Granted: 1970-10-20
•
Expires: 1988-07-18
Abstract
No abstract record available.
Inventors
- 👤 Hermann Schnell
- 👤 Gottfried Gerlach
- 👤 Rudolf Schneider
- 👤 Otto Court
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:43
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20; C; C08; C08G; C08G63/00; C08G63/78; C08G63/785; C08G64/00; C08G64/20; C08G64/205; B01J2219/00; B01J2219/18; B01J2219/182
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2927634A
Cited
US3017289A
Cited
US3260655A
Cited
DE1136982B
Cited
US3266555A
Cited
US3292683A
Cited
US3211209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |