US2855438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 4-bis-(2, 2-dimethyl-3-acetylcyclobutyl) butane and process of preparing
Assignee: Wyeth Holdings LLC
•
Filing: 1956-12-21
•
Granted: 1958-10-07
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Expires: 1976-12-21
Abstract
No abstract record available.
Inventors
- 👤 Richard K Madison
- 👤 Gloria K Bellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:03
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/29; C07C49/313; C07C49/317; C07C45/00; C07C45/51; C07C45/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
1,4-BIS-(2,2-DIMETHYL-3-ACETYLCYCLOBUTYL) BUTANE.
Claim 2
Dependent Claim
2 words
1,4-BIS-(2,2-DIMETHYL-3-ACETYLCYCLOBUTYL) BUTANE.
References Cited (Backward Citations)
US2275752A
Cited
US2750411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |