Patent US5737691A successfully refreshed from Google Patents.
Patent US3050519A successfully refreshed from Google Patents.
US3050519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclocarbonate esters of 16alpha, 17alpha-dihydroxypregnenes
Assignee: Olin Corp
•
Filing: 1960-05-13
•
Granted: 1962-08-21
•
Expires: 1980-05-13
Abstract
No abstract record available.
Inventors
- 👤 Fried Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:49
CPC Classifications
C; C07; C07J; C07J71/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A COMPOUND REPRESENTED BY THE FOLLOWING GENERAL FORMULA
Claim 2
Dependent Claim
8 words
A COMPOUND REPRESENTED BY THE FOLLOWING GENERAL FORMULA
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) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |