Patent US3499037A successfully refreshed from Google Patents.
US3499037A
Expired / Lapsed
US
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Preparation of trifluoromethyl substituted dibenzocycloheptenes
Assignee: Merck and Co Inc
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Filing: 1966-05-31
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Granted: 1970-03-03
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Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Edward L Engelhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:35
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/88; C07C; C07C17/00; C07C17/093; C07C17/35; C07C49/00; C07C49/587; C07C49/657; C07C49/683; C07C49/687; C07C49/697; C07C51/00; C07C51/09; C07C51/347; C07C51/36; C07C51/373; C07C63/00; C07C63/68; C07C63/70; C07C63/72; C07C63/74; C07C65/00; C07C65/01; C07C65/105; C07C65/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR THE PREPARATION OF THE COMPOUND OF STRUCTURAL FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE PREPARATION OF THE COMPOUND OF STRUCTURAL FORMULA
References Cited (Backward Citations)
US2692898A
Cited
US3215739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |