Patent US3314987A successfully refreshed from Google Patents.
US3314987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic reduction of fluorinated esters
Assignee: Individual
•
Filing: 1965-12-15
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Granted: 1967-04-18
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Expires: 1985-12-15
Abstract
No abstract record available.
Inventors
- 👤 Leslie C Case
- 👤 Yan Tsoung-Yuan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:20
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/66; C07C69/67; C07C69/708; B; B01; B01J; B01J37/00; B01J37/02; B01J37/03; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C29/149; C07C69/34; C07C69/675; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/85
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
THE PROCESS FOR CATALYTICALLY REDUCING PERFLUORINATED DIESTERS HAVING THE GENERAL FORMULA ROOC(CF3)NCOOR, WHEREIN R IS A LOWER ALKYL RACICAL, AND N IS A POSITIVE INTEGER HAVING A VALUE OF FROM 2 TO 4, INCLUSIVE, WHICH PROCESS AT PRESSURES OF FROM ABOUT 8000 TO MORE THAN 16,000 P.S.I. AND TEMPERATURES OF FROM ABOUT 50-300*C., IN THE PRESENCE OF FROM 20% TO 300% BY WEIGHT, BASED ON THE WEIGHT OF THE PERFLUORINATED DIESTER, OF A COPPERCHROMIUM OXIDE CATALYST ESSENTIALLY FREE OF UNCOMBINED ALKALINE EARTH OXIDE.
Claim 2
Dependent Claim
83 words
THE PROCESS FOR CATALYTICALLY REDUCING PERFLUORINATED DIESTERS HAVING THE GENERAL FORMULA ROOC(CF3)NCOOR, WHEREIN R IS A LOWER ALKYL RACICAL, AND N IS A POSITIVE INTEGER HAVING A VALUE OF FROM 2 TO 4, INCLUSIVE, WHICH PROCESS AT PRESSURES OF FROM ABOUT 8000 TO MORE THAN 16,000 P.S.I. AND TEMPERATURES OF FROM ABOUT 50-300*C., IN THE PRESENCE OF FROM 20% TO 300% BY WEIGHT, BASED ON THE WEIGHT OF THE PERFLUORINATED DIESTER, OF A COPPERCHROMIUM OXIDE CATALYST ESSENTIALLY FREE OF UNCOMBINED ALKALINE EARTH OXIDE.
Claim 3
Dependent Claim
10 words
THE PROCESS FOR CATALYTICALLY REDUCING PERFLUOROKETO-ESTERS HAVING THE GENERAL FORMULA
Claim 4
Dependent Claim
10 words
THE PROCESS FOR CATALYTICALLY REDUCING PERFLUOROKETO-ESTERS HAVING THE GENERAL 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) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |