Patent US3248407A successfully refreshed from Google Patents.
US3248407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of delta1, 3, 5(10) steroids
Assignee: Roche Palo Alto LLC
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Filing: 1964-07-13
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Granted: 1966-04-26
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Expires: 1984-07-13
Abstract
No abstract record available.
Inventors
- 👤 Alvarez Francisco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:05
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
2 words
19-NOR-$4-PREGNENE-10B,17A-3,20-DIONE 10-ACETATE.
Claim 2
Dependent Claim
2 words
19-NOR-$4-PREGNENE-10B,17A-3,20-DIONE 10-ACETATE.
Claim 3
Dependent Claim
69 words
A PROCESS FOR THE PREPARATION OF A $1,3,5(10)STEROID SUBSTITUTED AT THE 3-POSITION WITH A MEMBER SELECTION FROM THE GROUP CONSISTING OF A HYDROXYL GROUP, A LOWER ALKOXY GROUP AND AN ACYLOXY GROUPS CONTAINING LESS THAN 12 CARBON ATOMS WHICH COMPRISES REACTING A 10BLOWER ACYLOXY-19-NOR-$4-3-KETO STERIOD, WHEREIN SAID LOWER ACYLOXY GROUPS CONTAINS FROM 2 TO 7 CARBON ATOMS, INCLUSIVE, IN THE PRESENCE OF A CATALYTIC AMOUNT OF A PROTON DONOR.
Claim 4
Dependent Claim
69 words
A PROCESS FOR THE PREPARATION OF A $1,3,5(10)STEROID SUBSTITUTED AT THE 3-POSITION WITH A MEMBER SELECTION FROM THE GROUP CONSISTING OF A HYDROXYL GROUP, A LOWER ALKOXY GROUP AND AN ACYLOXY GROUPS CONTAINING LESS THAN 12 CARBON ATOMS WHICH COMPRISES REACTING A 10BLOWER ACYLOXY-19-NOR-$4-3-KETO STERIOD, WHEREIN SAID LOWER ACYLOXY GROUPS CONTAINS FROM 2 TO 7 CARBON ATOMS, INCLUSIVE, IN THE PRESENCE OF A CATALYTIC AMOUNT OF A PROTON DONOR.
References Cited (Backward Citations)
US2729654A
Cited
US3086028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |