Patent US2816893A successfully refreshed from Google Patents.
US2816893A
Expired / Lapsed
US
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Improvements in or relating to
Assignee: —
•
Filing: —
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Granted: 1957-12-17
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Expires: 1974-12-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:56
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/38; C07D215/42; C07D215/46; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/435; A61K31/47; C07D215/20; C07D215/22; C07D215/233; C07D215/48; C07D215/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
NEW QUINOLINE DERIVATIES OF VALUE IN HUMAN AND VETERINARY MEDICINE, PARTICULARLY AS AMOEBICIDES, SELECTED FROM THE CLASS CONSISTING OF BASES OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
24 words
NEW QUINOLINE DERIVATIES OF VALUE IN HUMAN AND VETERINARY MEDICINE, PARTICULARLY AS AMOEBICIDES, SELECTED FROM THE CLASS CONSISTING OF BASES OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2050971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |