US3432473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of aliphatic or cycloaliphatic polyesters of carbonic acid
Assignee: Huels AG
•
Filing: 1965-05-10
•
Granted: 1969-03-11
•
Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang Seeliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/02; C08G64/0208; C08G64/0216
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3022272A
Cited
US3313777A
Cited
US3177179A
Cited
GB925139A
Cited
US3359242A
Cited
US3245963A
Cited
US3301824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |