Patent US2750402A successfully refreshed from Google Patents.
US2750402A
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6, 7-diacetyl-1, 2, 3, 4, 4a, 9, 10, 10a-octahydro-1, 4a-dimethyl-9-oxophenanthrene-1-carbonitrile
Assignee: Hercules Powder Co
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Filing: 1955-05-02
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Granted: 1956-06-12
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Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Sanderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:27
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/002; C; C07; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
6,7-DIACETYL-1,2,3,4,4A,9,10,10A-OCTAHYDRO-1, METHYL-9-OXOPHENANTHRENE-1-CARBONITRILE.
Claim 2
Dependent Claim
2 words
6,7-DIACETYL-1,2,3,4,4A,9,10,10A-OCTAHYDRO-1, METHYL-9-OXOPHENANTHRENE-1-CARBONITRILE.
References Cited (Backward Citations)
US2704283A
Cited
US2703796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |