US2918478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinylene carbonate and methods of preparing it
Assignee: Ohio State University Research Foundation
•
Filing: 1957-04-16
•
Granted: 1959-12-22
•
Expires: 1977-04-16
Abstract
No abstract record available.
Inventors
- 👤 Melvin S Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/34; C07D317/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOSITION OF MATTER CONSISITNG OF
Claim 2
Dependent Claim
6 words
A COMPOSITION OF MATTER CONSISITNG OF
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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |