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Patent US3272864A successfully refreshed from Google Patents.
US3272864A
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Process for preparing 5-(3-aminopropylidene)-5h-dibenzo [a, d] cycloheptene and 5h-dibenzo [a, d]-10, 11-dihydro-cycloheptene derivatives
Assignee: Merck and Co Inc
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Filing: 1962-04-19
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Granted: 1966-09-13
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert D Hoffsommer
- 👤 Taub David
- 👤 Norman L Wendler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:45
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2599497A
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US2647929A
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US2886604A
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US2908720A
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GB858187A
Cited
US2978517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |