US2862977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of perfluoroalkanoic acids to 1, 1-dihydroperfluoroalkyl alcohols over ruthenium catalyst
Assignee: EIDP Inc
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Filing: 1956-12-21
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Granted: 1958-12-02
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Expires: 1976-12-21
Abstract
No abstract record available.
Inventors
- 👤 Schreyer Ralph Courtenay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:53
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C29/149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR THE PREPARATION OF 1,1-DIHYDROPERFLUOROALKYL ALCOHOLS HAVING THE FORMULA:
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE PREPARATION OF 1,1-DIHYDROPERFLUOROALKYL ALCOHOLS HAVING THE FORMULA:
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |