US2769808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dioxolane compounds
Assignee: Nepera Chemical Co Inc
•
Filing: 1953-08-13
•
Granted: 1956-11-06
•
Expires: 1973-08-13
Abstract
No abstract record available.
Inventors
- 👤 Leon E Tenenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:12
CPC Classifications
A; A61; A61K; A61K31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
COMPOUNDS OF THE GROUP CONSISTING OF
Claim 2
Dependent Claim
6 words
COMPOUNDS OF THE GROUP CONSISTING OF
References Cited (Backward Citations)
US2428805A
Cited
US2636884A
Cited
US2439969A
Cited
US2606909A
Cited
US2606907A
Cited
US2606908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |