Patent US3219673A successfully refreshed from Google Patents.
US3219673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6,6-difluoro-3-keto-delta4 steroids and their preparation
Assignee: EIDP Inc
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Filing: 1963-07-25
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Granted: 1965-11-23
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Expires: 1983-07-25
Abstract
No abstract record available.
Inventors
- 👤 Jr George A Boswell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:39
CPC Classifications
C; C07; C07J; C07J5/00; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
6,6-DIFLUORO-3KETO-$4 STEROIDS OF THE FORMULA
Claim 2
Dependent Claim
5 words
6,6-DIFLUORO-3KETO-$4 STEROIDS 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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |