Patent US2624730A successfully refreshed from Google Patents.
US2624730A
Expired / Lapsed
US
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6-haloaryl-3-pyridazones
Assignee: STWB Inc
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Filing: 1950-08-16
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Granted: 1953-01-06
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Expires: 1970-08-16
Abstract
No abstract record available.
Inventors
- 👤 Steck Edgar Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:20
CPC Classifications
C; C07; C07D; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A 6-ARYL-3-PYRIDAZONE HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A 6-ARYL-3-PYRIDAZONE HAVING THE FORMULA
Claim 3
Dependent Claim
23 words
THE PROCESS FOR PREPARING 6-(3,4-DICHLOROPHENYL)-3-PYRIDAZONE, WHICH COMPRISES CONDENSING BETA-(3,4-DICHLOROBENZOYL) PROPIONIC ACID WITH HYDRAZINE UNDER ALKALINE CONDITIONS AND DEHYDROGENATING THE RASULTING 6-(3,4-DICHLOROPHENYL)-4,5-DIDYDRO-3-PYRIDAZONE WITH BROMINE.
Claim 4
Dependent Claim
23 words
THE PROCESS FOR PREPARING 6-(3,4-DICHLOROPHENYL)-3-PYRIDAZONE, WHICH COMPRISES CONDENSING BETA-(3,4-DICHLOROBENZOYL) PROPIONIC ACID WITH HYDRAZINE UNDER ALKALINE CONDITIONS AND DEHYDROGENATING THE RASULTING 6-(3,4-DICHLOROPHENYL)-4,5-DIDYDRO-3-PYRIDAZONE WITH BROMINE.
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) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |