US1995291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylene carbonate and process of making it
Assignee: EIDP Inc
•
Filing: 1929-11-12
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Granted: 1935-03-26
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Expires: 1949-11-12
Abstract
No abstract record available.
Inventors
- 👤 Wallace H Carothers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:26
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/04; C07D319/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-03-25 | 1938-09-24 | 1939-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-25 | 1942-09-24 | 1943-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-25 | 1946-09-24 | 1947-03-26 | $7700.00 | Window Closed / Lapsed |