US3002993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted trioxo-octahydroanthracenes and octahydronaphthacenes
Assignee: Wyeth Holdings LLC
•
Filing: 1959-01-30
•
Granted: 1961-10-03
•
Expires: 1979-01-30
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Wilkinson
- 👤 Thomas L Fields
- 👤 Andrew S Kende
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:27
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 6
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
5 words
A COMPOUND OF THE FORMULA:
Claim 4
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 5
Independent Claim
9 words
THE METHOD OF PREPARING A COMPOUND OF THE FORMULA:
Claim 6
Independent Claim
9 words
THE METHOD OF PREPARING A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US2744931A
Cited
US2783261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |