Patent US5111466A successfully refreshed from Google Patents.
Patent US4143079A successfully refreshed from Google Patents.
US4143079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel process for production of perfluoro p-methane from pinene
Assignee: Adamantech Inc
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Filing: 1978-05-15
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Granted: 1979-03-06
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Expires: 1998-05-15
Abstract
Abstract Pinene can be converted to perfluoro-p-menthane in high yield by first hydrogenating pinene to form pinane, and then perfluorinating the same with CoF 3 . Ring cleavage of the pinane to form p-menthane is achieved simultaneously with the perfluorination in a single step to obtain perfluoro-p-menthane, a valuable synthetic blood substitute material.
Inventors
- 👤 Robert E. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:26
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A process for the preparation of perfluoro-1-methyl-4-isopropylcyclohexane which comprises perfluorinating pinane by contacting it with CoF 3 at a temperature greater than 175° C.
Claim 2
Dependent Claim
24 words
A process for the preparation of perfluoro-1-methyl-4-isopropylcyclohexane which comprises perfluorinating pinane by contacting it with CoF 3 at a temperature greater than 175° C.
Claim 3
Dependent Claim
38 words
The process of claim 1 wherein the reaction is carried out in a multi-zone reactor in which the temperature is graduated from zone to zone across the reactor with the highest temperature at the outlet of said reactor.
Claim 4
Dependent Claim
31 words
The process of claim 1 wherein the pinane product is recycled through the reactor a second time at an overall temperature about 100° C. higher than that of the first pass.
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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |