US3256335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making 5h-dibenzo [a, d] cyclohepten-5-ones
Assignee: Merck and Co Inc
•
Filing: 1964-01-16
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Granted: 1966-06-14
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Expires: 1984-01-16
Abstract
No abstract record available.
Inventors
- 👤 Harry L Slates
- 👤 Norman L Wendler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:24
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/587; C07C49/657; C07C49/683; C07C1/00; C07C1/20; C07C1/24; C07C33/00; C07C33/05; C07C33/16; C07C45/00; C07C45/61; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/30; C07C2603/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A METHOD FOR MAKING 5H-DIBENZO(A,D)CYCLOHEPTEN5-ONES FROMTHE CORRESPONDING 10,11-DIHYDRO-5HDIBENZO-(A,D)CYCLOHEPTEN-5-ONES WHICH COMPRISES INTRODUCING A DOUBLE BOND BETWEEN THE 10 AND 11 POSITIONS OF SAID DIHYDRO COMPOUND BY REACTING THE LATTER WITH A PHOSPHORUS PENTAHALIDE HAVING AHALOGEN SUBSTITUENT OF AN ATOMIC WEIGHT OF AT LEAST 35 AND NO GREATER THAN 80 TO FORM THE PHOSPHORUS PENTAHALIDE ADDITION COMPLEX OF THE CORRESPONDING 10, 11-UNSATURATED KETONE AND THEREAFTER HYDROLYZING SAID COMPLEX IN AN AQUEOUS MEDIUM.
Claim 2
Independent Claim
70 words
A METHOD FOR MAKING 5H-DIBENZO(A,D)CYCLOHEPTEN5-ONES FROMTHE CORRESPONDING 10,11-DIHYDRO-5HDIBENZO-(A,D)CYCLOHEPTEN-5-ONES WHICH COMPRISES INTRODUCING A DOUBLE BOND BETWEEN THE 10 AND 11 POSITIONS OF SAID DIHYDRO COMPOUND BY REACTING THE LATTER WITH A PHOSPHORUS PENTAHALIDE HAVING AHALOGEN SUBSTITUENT OF AN ATOMIC WEIGHT OF AT LEAST 35 AND NO GREATER THAN 80 TO FORM THE PHOSPHORUS PENTAHALIDE ADDITION COMPLEX OF THE CORRESPONDING 10, 11-UNSATURATED KETONE AND THEREAFTER HYDROLYZING SAID COMPLEX IN AN AQUEOUS MEDIUM.
Claim 3
Dependent Claim
10 words
A PHOSPHORUS PENTAHALIDE ADDITION COMPLEX OF COMPOUNDS OF THE FORMULA
Claim 4
Dependent Claim
10 words
A PHOSPHORUS PENTAHALIDE ADDITION COMPLEX OF COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
US3132187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |