US2648679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-keto-8ro-1, 2, 3, 4 alpha, 5, 6, 10 beta, 11, 12, 12 alpha dodecahydrochrysenes
Assignee: Wisconsin Alumni Research Foundation
•
Filing: 1950-08-08
•
Granted: 1953-08-11
•
Expires: 1970-08-08
Abstract
No abstract record available.
Inventors
- 👤 William S Johnson
- 👤 Dilip K Banerjee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:29
CPC Classifications
C; C07; C07J; C07J63/00; C07J63/008; C07C; C07C2603/00; C07C2603/02; C07C2603/40; C07C2603/42; C07C2603/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
THE PRODUCTS SELECTED FROM THE GROUP CONSISTING OF 1-KETO-8-RO-1,2,3,4,4A,4B,5,610B,11, 12,12A-DODECAHYDROCHRYSENE AND 2-ARYLMETHYLENE DERIVATIVES THEREOF, WHERE R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND HYDROCARBON BLOCKING GROUPS CONTAINING 1 TO 8 CARBON ATOMS.
Claim 2
Dependent Claim
34 words
THE PRODUCTS SELECTED FROM THE GROUP CONSISTING OF 1-KETO-8-RO-1,2,3,4,4A,4B,5,610B,11, 12,12A-DODECAHYDROCHRYSENE AND 2-ARYLMETHYLENE DERIVATIVES THEREOF, WHERE R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND HYDROCARBON BLOCKING GROUPS CONTAINING 1 TO 8 CARBON ATOMS.
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |