US3953531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylhydroquinone and process for producing the same
Assignee: Fujifilm Holdings Corp
•
Filing: 1974-12-19
•
Granted: 1976-04-27
•
Expires: 1994-12-19
Abstract
Abstract 2,5-BIS-(1',1'-Dimethylbutyl)hydroquinone and a process for the production thereof which comprises reacting hydroquinone with 2-methyl-1-pentene.
Inventors
- 👤 Reiichi Ohi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:03
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C39/00; C07C39/02; C07C39/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
2,5-bis-(1',1'-Dimethylbutyl)hydroquinone.
Claim 2
Dependent Claim
1 words
2,5-bis-(1',1'-Dimethylbutyl)hydroquinone.
References Cited (Backward Citations)
US2455746A
Cited
US2511193A
Cited
US2722556A
Cited
US2732300A
Cited
GB858028A
Cited
US3772393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |