Patent US3192250A successfully refreshed from Google Patents.
US3192250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted 2-nitromethyl-4, 10-dioxo-5-hydroxy-1, 2, 3, 4, 4a, 9, 9a, 10-octahydroanthracenes
Assignee: Wyeth Holdings LLC
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Filing: 1962-10-22
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Granted: 1965-06-29
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Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Fields Thomas Lynn
- 👤 Wilkinson Raymond George
- 👤 Kende Andrew Steven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:14
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0042; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THOSE OF THE FORMULA:
Claim 2
Dependent Claim
12 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THOSE OF THE FORMULA:
References Cited (Backward Citations)
US3002993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |