US2870218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ochscf
Assignee: —
•
Filing: —
•
Granted: 1959-01-20
•
Expires: 1976-01-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:42
CPC Classifications
—
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE METHOD FOR THE PREPARATION OF 2,2,2-TRIFLUOROETHYL VINYL ETHER WHICH COMPRISES PASSING THE VAPOR OF DI-(2,2,2-TRIFLUOROETHYL) ACETALDEHYDE ACETAL UPWARDLY THROUGH A CATALYST BED COMPRISING AN ACID-ACTIVATED CLAY IN FINELY DIVIDED FORM, WHILE MAINTAINING SAID ACETAL AT AN ELEVATED TEMPERATURE, AND DELIVERING SAID ACETAL AT A RATE EFFECTIVE TO MAINTAIN SAID CATALYST BED IN A FLUIDIZED STATE.
Claim 2
Independent Claim
56 words
THE METHOD FOR THE PREPARATION OF 2,2,2-TRIFLUOROETHYL VINYL ETHER WHICH COMPRISES PASSING THE VAPOR OF DI-(2,2,2-TRIFLUOROETHYL) ACETALDEHYDE ACETAL UPWARDLY THROUGH A CATALYST BED COMPRISING AN ACID-ACTIVATED CLAY IN FINELY DIVIDED FORM, WHILE MAINTAINING SAID ACETAL AT AN ELEVATED TEMPERATURE, AND DELIVERING SAID ACETAL AT A RATE EFFECTIVE TO MAINTAIN SAID CATALYST BED IN A FLUIDIZED STATE.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |