Patent US3824296A successfully refreshed from Google Patents.
US3824296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of 1,1,2,2-tetrahydro-perfluoro-alkanols
Assignee: Hoechst AG
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Filing: 1971-06-07
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Granted: 1974-07-16
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Expires: 1991-06-07
Abstract
Abstract 2-PERFLUOROALKYL ETHANOLS ARE OBTAINED BY REACTING 2PERFLUORO-ALKYL ETHYLIODIDES WITH AT LEAST THE TWO-FOLD MOLAR AMOUNT OF NITRIC ACID OF ABOUT 70 TO 98% STRENGTH AND HYDROGENATING THE INTERMEDIATES,WHICH ARE THE NITRATES OF THE DESIRED ETHANOLS. THE PRODUCTS ARE USEFUL AS STARTING MATERIALS FOR THE PRODUCTION OF HYDROPHOBIC AND OLEOPHOBIC TEXTILE FINISHING AGENTS, E.G. THE POLYMER ACRYLATES AND METHACRYLATES OF SAID 2-PERFLUOROALKYL-ETHANOLS.
Inventors
- 👤 I Wimmer
- 👤 E Schuierer
- 👤 K Ulm
- 👤 S Rebsdat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:25
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/02; C07C201/04; C07C29/00; C07C29/132
Claims Analysis
Total Claims: 0
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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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |