Patent US2997476A successfully refreshed from Google Patents.
US2997476A
Expired / Lapsed
US
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1-alkyl-4-aminoquinaldinium salts
Assignee: Allen and Hanburys Ltd
•
Filing: 1959-06-02
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Granted: 1961-08-22
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Expires: 1979-06-02
Abstract
No abstract record available.
Inventors
- 👤 Caldwell Dennis
- 👤 Rowe Leonard Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:46
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/38; C07D215/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
1-ALKYL-4-AMINOQUINALDINIUM SALTS OF THE FORMULA:
Claim 2
Dependent Claim
5 words
1-ALKYL-4-AMINOQUINALDINIUM SALTS OF THE FORMULA:
References Cited (Backward Citations)
US2791582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |