Patent US2838535A successfully refreshed from Google Patents.
US2838535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-fluoro steroids and process
Assignee: Pharmacia and Upjohn Co
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Filing: 1957-11-29
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Granted: 1958-06-10
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Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 Barney J Magerlein
- 👤 George B Spero
- 👤 William P Schneider
- 👤 John A Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 6,21-DIFLUORO-21-DESOXYHYDROCORTISONE AND 6,21-DIFLUORO21-DESOXYCORTISONE.
Claim 2
Dependent Claim
11 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 6,21-DIFLUORO-21-DESOXYHYDROCORTISONE AND 6,21-DIFLUORO21-DESOXYCORTISONE.
References Cited (Backward Citations)
US2813883A
Cited
US2814632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |