US2879311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrochlorination of trichlorobutane
Assignee: Distillers Co Yeast Ltd
•
Filing: 1956-07-18
•
Granted: 1959-03-24
•
Expires: 1976-07-18
Abstract
No abstract record available.
Inventors
- 👤 Hawkins Edwin George Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:40
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS WHICH COMPRISES HEATING 1:2:3-TRICHLOROBUTANE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF THE HYDROCHLORIDES AND QUATERNARY AMMONIUM CHLORIDE SALTS OF AN AMINE HAVING A PK VALUE IN THE RANGE 3.0 TO 9.0 AND A BOILING POINT AT ATMPSHHERIC PRESSURE BETWEEN 110*C. AND 250*C.
Claim 2
Dependent Claim
49 words
A PROCESS WHICH COMPRISES HEATING 1:2:3-TRICHLOROBUTANE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF THE HYDROCHLORIDES AND QUATERNARY AMMONIUM CHLORIDE SALTS OF AN AMINE HAVING A PK VALUE IN THE RANGE 3.0 TO 9.0 AND A BOILING POINT AT ATMPSHHERIC PRESSURE BETWEEN 110*C. AND 250*C.
References Cited (Backward Citations)
CA497941A
Cited
US2038538A
Cited
US1998442A
Cited
US2180115A
Cited
US2524383A
Cited
US2361072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |