Patent US3291798A successfully refreshed from Google Patents.
US3291798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroquinones, lower alkanoyl derivatives thereof and processes for their production
Assignee: Pharmacia and Upjohn Co
•
Filing: 1964-02-25
•
Granted: 1966-12-13
•
Expires: 1984-02-25
Abstract
No abstract record available.
Inventors
- 👤 Louis L Skaletzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:07
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/79; C07D307/81
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
14 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) (2-AMINOETHYL) HYDROQUINONE OF THE FORMULA
References Cited (Backward Citations)
US3184457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |