Patent US2673173A successfully refreshed from Google Patents.
US2673173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 1, 1, 3-trichloro-2, 3, 3-trifluoropropene and method of fumigating therewith
Assignee: Dow Chemical Co
•
Filing: 1950-05-26
•
Granted: 1954-03-23
•
Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
- 👤 Robert P Ruh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:35
CPC Classifications
C; C07; C07C; C07C21/00; C07C21/02; C07C21/18; C07C17/00; C07C17/25
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
60 words
A METHOD OF PRODUCING 1,1,3-TRICHLORO-2,3,3TRIFLUOROPROPENE WHICH COMPRISES GRADUALLY ADDING AN ALKALI CONSISTING OF AQUEOUS SODIUM HYDROXIDE TO A BODY OF REFLUXING 1,1,2,3-TETRACHLORO2,3,3-TRIFLUOROPROPANE UNTIL THERE IS ADDED A PROPORTION FROM 10 TO 50 PER CENT IN EXCESS OF THAT STOICHIOMETRICLLY REQUIRED FOR DEHYDROCHLORINATION, HEATING THE RESULTING MIXTURE UNDER REFLUX UNTIL REACTION IS COMPLETE AND FRACTIONATING 1,1,3TRICHLORO 2,3,3-TRIFLUOROPROPENE FROM THE REACTED MIXTURE.
Claim 2
Independent Claim
60 words
A METHOD OF PRODUCING 1,1,3-TRICHLORO-2,3,3TRIFLUOROPROPENE WHICH COMPRISES GRADUALLY ADDING AN ALKALI CONSISTING OF AQUEOUS SODIUM HYDROXIDE TO A BODY OF REFLUXING 1,1,2,3-TETRACHLORO2,3,3-TRIFLUOROPROPANE UNTIL THERE IS ADDED A PROPORTION FROM 10 TO 50 PER CENT IN EXCESS OF THAT STOICHIOMETRICLLY REQUIRED FOR DEHYDROCHLORINATION, HEATING THE RESULTING MIXTURE UNDER REFLUX UNTIL REACTION IS COMPLETE AND FRACTIONATING 1,1,3TRICHLORO 2,3,3-TRIFLUOROPROPENE FROM THE REACTED MIXTURE.
Claim 3
Independent Claim
29 words
A METHOD OF FUMIGATING BEETLES AND BEETLE LARVAE WHICH COMPRISES TREATING THEM WITH 1,1,3TRICHLORO - 2,3,3 - TRIFLUROPROPENE VAPORIZED IN LETHAL CONCENTRATION INTO THE ATMOSPHERE IN CONTACT WITH THEM.
Claim 4
Independent Claim
29 words
A METHOD OF FUMIGATING BEETLES AND BEETLE LARVAE WHICH COMPRISES TREATING THEM WITH 1,1,3TRICHLORO - 2,3,3 - TRIFLUROPROPENE VAPORIZED IN LETHAL CONCENTRATION INTO THE ATMOSPHERE IN CONTACT WITH THEM.
References Cited (Backward Citations)
US2514473A
Cited
US2344061A
Cited
US2415251A
Cited
FR920161A
Cited
US2439505A
Cited
US2456768A
Cited
US2549580A
Cited
US2547822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |