US3283012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 2-perfluoroalkylethanol
Assignee: EIDP Inc
•
Filing: 1962-05-29
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Granted: 1966-11-01
•
Expires: 1982-05-29
Abstract
No abstract record available.
Inventors
- 👤 Day Richard Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:50
CPC Classifications
C; C07; C07C; C07C305/00; C07C305/02; C07C305/04; C07C305/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PROCESS FOR PREPARING FLUORINATED HYDROCARBON ALCOHOLS WHICH COMPRISES REACTING RFCH2I, WHEREIN RF IS A PERFLUOROALKYL GROUP CONTAINING FROM ONE TO TWENTY CARBON ATOMS, WITH OLEUM AT A TEMPERATURE AT WHICH THE REACTANTS ARE LIQUID THEREBY OBTAINING AN INTERMEDIATE FLUORALKYL HYDROGEN SULFATE OF THE FORMULA
Claim 2
Dependent Claim
45 words
A PROCESS FOR PREPARING FLUORINATED HYDROCARBON ALCOHOLS WHICH COMPRISES REACTING RFCH2I, WHEREIN RF IS A PERFLUOROALKYL GROUP CONTAINING FROM ONE TO TWENTY CARBON ATOMS, WITH OLEUM AT A TEMPERATURE AT WHICH THE REACTANTS ARE LIQUID THEREBY OBTAINING AN INTERMEDIATE FLUORALKYL HYDROGEN SULFATE OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |