Patent US3061267A successfully refreshed from Google Patents.
Patent US4037212A successfully refreshed from Google Patents.
Patent US2563247A successfully refreshed from Google Patents.
US2563247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
12, 21-dihalopregnanes and process
Assignee: Research Corp
•
Filing: 1949-09-07
•
Granted: 1951-08-07
•
Expires: 1969-09-07
Abstract
No abstract record available.
Inventors
- 👤 Edward C Kendall
- 👤 Gerard A Fleisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:39
CPC Classifications
C; C07; C07J; C07J13/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
4 words
COMPOUNDS OF THE 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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |