Patent US2527798A successfully refreshed from Google Patents.
US2527798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic fluorenyl ketones and carbinols and the production thereof
Assignee: GD Searle LLC
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Filing: 1947-08-15
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Granted: 1950-10-31
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Expires: 1967-08-15
Abstract
No abstract record available.
Inventors
- 👤 John W Cusie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:41
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/10; C07D295/104; C07D295/108; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A MEMBER OF THE GROPU CONSISTING OF A BASIC COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
13 words
A MEMBER OF THE GROPU CONSISTING OF A BASIC COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2280058A
Cited
US1749361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |