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Patent US2497347A successfully refreshed from Google Patents.
US2497347A
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Quinoline derivatives
Assignee: Imperial Chemical Industries Ltd
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Filing: 1945-07-31
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Granted: 1950-02-14
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Expires: 1965-07-31
Abstract
No abstract record available.
Inventors
- 👤 Curd Francis Henry Swinden
- 👤 Landquist Justus Kenneth
- 👤 Raison Clifford Gordon
- 👤 Rose Francis Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:15
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/38; C07D215/42; C07D215/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE SALTS AND FREE-BASE FORM OF 2-ARYLAMINO-4-SUBSTITUTED QUINOLINES, WHICH IN THE FORM OF FREE BASE HAVE THE FORMULA
Claim 2
Dependent Claim
26 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE SALTS AND FREE-BASE FORM OF 2-ARYLAMINO-4-SUBSTITUTED QUINOLINES, WHICH IN THE FORM OF FREE BASE HAVE THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |