US2495048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,2-dihydrobenzo-(f)-quinolin-3-ol, and its method of preparation
Assignee: GAF Chemicals Corp
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Filing: 1948-11-09
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Granted: 1950-01-17
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Expires: 1968-11-09
Abstract
No abstract record available.
Inventors
- 👤 Jr William F Amon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:04
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
THE PROCESS OF PRODUCING 1.2-DIHYDROBENZO(F)-QUINOLIN-3-OL, WHICH COMPRISES HEATING 1CYANOETHYL-2-NAPHTHOL WITH AQUEOUS AMMONIUM BISULFITE UNDER PRESSURE. 3. 1.2-DIHYDROBENZO-(F)-QUINOLIN-3-OL OF THE FOLLOWING STRUCTURE:
Claim 2
Dependent Claim
21 words
THE PROCESS OF PRODUCING 1.2-DIHYDROBENZO(F)-QUINOLIN-3-OL, WHICH COMPRISES HEATING 1CYANOETHYL-2-NAPHTHOL WITH AQUEOUS AMMONIUM BISULFITE UNDER PRESSURE. 3. 1.2-DIHYDROBENZO-(F)-QUINOLIN-3-OL OF THE FOLLOWING STRUCTURE:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |