Patent US2847457A successfully refreshed from Google Patents.
US2847457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroid intermediates
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1955-05-26
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Granted: 1958-08-12
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Expires: 1975-05-26
Abstract
No abstract record available.
Inventors
- 👤 William S Johnson
- 👤 Alexander D Kemp
- 👤 Pappo Raphael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:51
CPC Classifications
C; C07; C07J; C07J63/00; C07J63/008
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
25 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF TRANS-ANTI-TRANS AND CIS-ANTI-TRANS 1-RO-8,12-DI-LOWERALKANOYLOXY - 10A - METHYL -4B,5,L,6A,7,8,9,10,10A,10B, 11,12-DODECAHYDROCHRYSENE, WHERE R IS A LOWER ALKYL GROUP.
Claim 2
Dependent Claim
25 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF TRANS-ANTI-TRANS AND CIS-ANTI-TRANS 1-RO-8,12-DI-LOWERALKANOYLOXY - 10A - METHYL -4B,5,L,6A,7,8,9,10,10A,10B, 11,12-DODECAHYDROCHRYSENE, WHERE R IS A LOWER ALKYL GROUP.
Claim 3
Dependent Claim
22 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF TRANS-ANTI-TRANS AND CIS-ANTI-TRANS 1-KETO-8,11-DIHYDROXY10A - METHYL - 1,2,3,4B,5,6,6A,7,8,9,10,10A,10B,11,12HEXADECAHYDROCHRYSENE AND TRANS-ANTI-TRANS AND CIS-ANTITRANS 1-KETO-8,11-DIHYDROXY-10A-METHYL-1,4,4A,4B,5,6,6A,7, 8,9,10,10A,10B,11,12,12A-HEXADECAHYDROCHRYSENE.
Claim 4
Dependent Claim
22 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF TRANS-ANTI-TRANS AND CIS-ANTI-TRANS 1-KETO-8,11-DIHYDROXY10A - METHYL - 1,2,3,4B,5,6,6A,7,8,9,10,10A,10B,11,12HEXADECAHYDROCHRYSENE AND TRANS-ANTI-TRANS AND CIS-ANTITRANS 1-KETO-8,11-DIHYDROXY-10A-METHYL-1,4,4A,4B,5,6,6A,7, 8,9,10,10A,10B,11,12,12A-HEXADECAHYDROCHRYSENE.
Claim 5
Dependent Claim
12 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF TRANS-ANTI-TRANS AND CIS-ANTI-TRANS 1-KETO-8,11-DIHYDROXY10A-METHYL-OCTADECAHYDROCHRYSENE.
Claim 6
Dependent Claim
12 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF TRANS-ANTI-TRANS AND CIS-ANTI-TRANS 1-KETO-8,11-DIHYDROXY10A-METHYL-OCTADECAHYDROCHRYSENE.
References Cited (Backward Citations)
US2324881A
Cited
US2351637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |