Patent US2919977A successfully refreshed from Google Patents.
US2919977A
Expired / Lapsed
US
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Method for testing anticholinesterase agents
Assignee: Individual
•
Filing: 1957-01-25
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Granted: 1960-01-05
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Expires: 1977-01-25
Abstract
No abstract record available.
Inventors
- 👤 George A Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:34
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/14; C07D333/20; Y; Y10; Y10T; Y10T436/00; Y10T436/16; Y10T436/163333
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
IN THE METHOD FOR TESTING FOR THE PRESENCE OF ANTICHOLINESTERASE AGENTS IN WATER USING THE SCHOENEMANN REACTION, THE IMPROVEMENT WHICH COMPRISES USING, AS THE INDICATOR IN SUCH REACTION, A COMPOUND SELECTED FROM THE GROUP OF COMPOUNDS HAVING THE FORMULAE
Claim 2
Dependent Claim
39 words
IN THE METHOD FOR TESTING FOR THE PRESENCE OF ANTICHOLINESTERASE AGENTS IN WATER USING THE SCHOENEMANN REACTION, THE IMPROVEMENT WHICH COMPRISES USING, AS THE INDICATOR IN SUCH REACTION, A COMPOUND SELECTED FROM THE GROUP OF COMPOUNDS HAVING THE FORMULAE
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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |