Patent US2477161A successfully refreshed from Google Patents.
Patent US3158624A successfully refreshed from Google Patents.
US3158624A
Expired / Lapsed
US
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Preparation of trichlorofuroylchloride
Assignee: Hooker Chemical Corp
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Filing: 1961-06-02
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Granted: 1964-11-24
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Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
- 👤 Leon Edward
- 👤 Edward D Weil
- 👤 Linder Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:01
CPC Classifications
A; A01; A01N; A01N43/00; A01N43/02; A01N43/04; A01N43/06; A01N43/08; C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR PREPARING 3,4,5-TRICHLORO-2-FUROYL CHLORIDE WHICH COMPRISES HEATING TETRACHLOROCOUMALIN TO A TEMPERATURE OF FROM ABOUT 200 DEGREE TO ABOUT 340 DEGREES CENTIGRADE AND MAINTAINING THE TEMPERATURE IN SAID RANGE UNTIL A SUBSTANTIAL AMOUNT OF 3,4,5-TRICHLORO2-FUROYL CHLORIDE IS FORMED.
Claim 2
Dependent Claim
39 words
A PROCESS FOR PREPARING 3,4,5-TRICHLORO-2-FUROYL CHLORIDE WHICH COMPRISES HEATING TETRACHLOROCOUMALIN TO A TEMPERATURE OF FROM ABOUT 200 DEGREE TO ABOUT 340 DEGREES CENTIGRADE AND MAINTAINING THE TEMPERATURE IN SAID RANGE UNTIL A SUBSTANTIAL AMOUNT OF 3,4,5-TRICHLORO2-FUROYL CHLORIDE IS FORMED.
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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |