Patent US3344038A successfully refreshed from Google Patents.
US3344038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resolution of racemic steroids
Assignee: Wyeth LLC
•
Filing: 1963-10-23
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Granted: 1967-09-26
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Greenspan George
- 👤 Leland L Smith
- 👤 Theodore J Foell
- 👤 Rees Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:45
CPC Classifications
C; C12; C12P; C12P33/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/843
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
THE METHOD OF AROMATIZING THE A-RING AND RESOLVING RACEMIC STEROIDS WHICH COMPRISES FERMENTING A RACEMIC STEROID HAVING THE FORMULA
Claim 2
Independent Claim
19 words
THE METHOD OF AROMATIZING THE A-RING AND RESOLVING RACEMIC STEROIDS WHICH COMPRISES FERMENTING A RACEMIC STEROID HAVING THE FORMULA
References Cited (Backward Citations)
US2928850A
Cited
US3189528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |