US2992276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyfluoro alkyl compounds
Assignee: EIDP Inc
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Filing: 1959-05-20
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Granted: 1961-07-11
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Expires: 1979-05-20
Abstract
No abstract record available.
Inventors
- 👤 Weinmayr Viktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:57
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
THE PROCESS WHICH COMPRISES REACTING ABOUT 0.5 MOLE OF TETRAFLUOROETHYLENE WITH 1 MOLE FORMALDEHYDE AND AT LEAST 2 MOLES OF HYDROGEN FLUORIDE AT A TEMPERATURE IN THE RANGE OF FROM 0*C. TO 150*C. AND A PRESSURE IN THE RANGE OF FROM 0 P.S.I.G. TO ABOUT 2500 P.S.I.G., THERE BEING PRESENT NOT MORE THAN 1 PART OF WATER FOR EACH PART OF HYDROGEN FLUORIDE, AND SEPARATING FROM THE REACTION MASS AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF 1H,1HPENTAFLUORO-1-PROPANOL AND FLUOROMETHYL 2,2,3,3,3-PENTAFLUOROPROPYL ETHER.
Claim 2
Dependent Claim
83 words
THE PROCESS WHICH COMPRISES REACTING ABOUT 0.5 MOLE OF TETRAFLUOROETHYLENE WITH 1 MOLE FORMALDEHYDE AND AT LEAST 2 MOLES OF HYDROGEN FLUORIDE AT A TEMPERATURE IN THE RANGE OF FROM 0*C. TO 150*C. AND A PRESSURE IN THE RANGE OF FROM 0 P.S.I.G. TO ABOUT 2500 P.S.I.G., THERE BEING PRESENT NOT MORE THAN 1 PART OF WATER FOR EACH PART OF HYDROGEN FLUORIDE, AND SEPARATING FROM THE REACTION MASS AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF 1H,1HPENTAFLUORO-1-PROPANOL AND FLUOROMETHYL 2,2,3,3,3-PENTAFLUOROPROPYL ETHER.
Claim 3
Dependent Claim
3 words
FLUOROMETHYL 2,2,3,3,3-PENTAFLUOROPROPYL ETHER.
Claim 4
Dependent Claim
3 words
FLUOROMETHYL 2,2,3,3,3-PENTAFLUOROPROPYL ETHER.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |