Patent US3235573A successfully refreshed from Google Patents.
US3235573A
Expired / Lapsed
US
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19-lower alkylidene and 19-oxo-delta4-androsten-17beta-ol-3-one derivatives
Assignee: Roche Palo Alto LLC
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Filing: 1962-12-20
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Granted: 1966-02-15
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Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 Bowers Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:46
CPC Classifications
C; C07; C07J; C07J1/00; A; A23; A23K; A23K20/00; A23K20/10; A23K20/168; C07J75/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
6 words
A COMPOUND OF THE FOLLOWING FORMULA:
Claim 4
Dependent Claim
6 words
A COMPOUND OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |