US2784240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclooctatetraene derivatives
Assignee: Merck and Co Inc
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Filing: 1952-12-27
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Granted: 1957-03-05
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Expires: 1972-12-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Cope
- 👤 Burg Marion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:06
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/02; C07C23/16; C07C17/00; C07C17/23
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
MONOHALOGEN SUBSTITUTION PRODUCTS OF CYCLOOCTATETRAENE WHEREIN THE HALOGEN IS SELECTED FROM THE CLASS CONSISTING OF CHLORINE AND BROMINE.
Claim 2
Dependent Claim
18 words
MONOHALOGEN SUBSTITUTION PRODUCTS OF CYCLOOCTATETRAENE WHEREIN THE HALOGEN IS SELECTED FROM THE CLASS CONSISTING OF CHLORINE AND BROMINE.
Claim 3
Dependent Claim
48 words
THE PROCESS FOR PRODUCING MONOHALOGEN DERIVATIVES OF CYCLOOCTATETRAENE SELECTED FROM THE CALSS CONSISTING OF CHLORINE AND BROMINE, WHICH CONSISTS IN REACTING THE CORRESPONDING CYCLOOCTATETRAENE DIHALIDE WITH A BASE SELECTED FROM THE GROUP CONSISTING OF PHENYLLITHIUM, LITHIUM DIETHYLAMIDE AND LITHIUM 2,6-DIMETHYLPIPERIDIDE AT A TEMPERATURE BETWEEN -30* TO -2* C.
Claim 4
Dependent Claim
48 words
THE PROCESS FOR PRODUCING MONOHALOGEN DERIVATIVES OF CYCLOOCTATETRAENE SELECTED FROM THE CALSS CONSISTING OF CHLORINE AND BROMINE, WHICH CONSISTS IN REACTING THE CORRESPONDING CYCLOOCTATETRAENE DIHALIDE WITH A BASE SELECTED FROM THE GROUP CONSISTING OF PHENYLLITHIUM, LITHIUM DIETHYLAMIDE AND LITHIUM 2,6-DIMETHYLPIPERIDIDE AT A TEMPERATURE BETWEEN -30* TO -2* C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |