US3282929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparation of aromatic a ring steroids
Assignee: Wyeth Holdings LLC
•
Filing: 1964-07-06
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Granted: 1966-11-01
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Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Heller Milton
- 👤 Lenhard Robert Herman
- 👤 Bernstein Seymour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:57
CPC Classifications
C; C07; C07J; C07J5/00; C07J1/00; C07J7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF PREPARING STEROIDS OF THE FORMULA: 3-OH,6-R-1,3,5(10),6,8-ESTRAPENTAENE WHERE CARBONS 16 . WHEREIN C17-C16 IS A DIVALENT RADICAL OF THE GROUP CONSISTING OF -CH(-OH)-CH2-,-CH(-O-LOWER ALKANOYL)-CH2-, -CO-CH2AND R IS A MEMBER OF THE GROUP CONSISTING OF HYDROGENM FLUORINE AND LOWER ALKYL WHICH COMPRISES CONTACTING A STERIOD OF THE FORMULA: 6-R,11-HO-1,4,8-ANDROSTATRIEN-3-ONE AND 17 ARE SO NUMBERED
Claim 2
Independent Claim
55 words
A METHOD OF PREPARING STEROIDS OF THE FORMULA: 3-OH,6-R-1,3,5(10),6,8-ESTRAPENTAENE WHERE CARBONS 16 . WHEREIN C17-C16 IS A DIVALENT RADICAL OF THE GROUP CONSISTING OF -CH(-OH)-CH2-,-CH(-O-LOWER ALKANOYL)-CH2-, -CO-CH2AND R IS A MEMBER OF THE GROUP CONSISTING OF HYDROGENM FLUORINE AND LOWER ALKYL WHICH COMPRISES CONTACTING A STERIOD OF THE FORMULA: 6-R,11-HO-1,4,8-ANDROSTATRIEN-3-ONE AND 17 ARE SO NUMBERED
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |