Patent US5658308A successfully refreshed from Google Patents.
Patent US3228864A successfully refreshed from Google Patents.
US3228864A
Expired / Lapsed
US
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Photochemical process for preparing fluorinated three membered rings
Assignee: EIDP Inc
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Filing: 1962-01-22
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Granted: 1966-01-11
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Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Sebastian V R Mastrangelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:14
CPC Classifications
C; C07; C07D; C07D331/00; C07D331/02; C07C; C07C17/00; C07C17/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A PROCESS FOR PRODUCING: CF2 IN THE SINGLET STATE WHICH COMPRISES SUBJECTING TO ULTRAVIOLET RADIATION A COMPOUND OF THE FORMULA R1CF=CF2 AND FROM ONE TO ABOUT 50 MOLE PERCENT OF A DILUENT, SAID DILUENT BEING SELECTED FROM THE GROUP CONSISTING OF ALKANES, ALKENES AND COMPOUNDS OF THE FORMULA R2R3C=X, WHEREIN R1, R2, AND R3 ARE SELECTED FROM THE GROUP CONSISTING OF FLUORINE, CHLORINE, AND PERFLUROOALKYL GROUPS CONTAING 1 TO 10 CARBON ATOMS, AND X IS SELECTED FROM THE GROUP CONSISTING OF SULFUR, THE CFCI GROUP AND THE CR2 GROUP; WHEREIN SAID COMPOUND OF THE FORMULA R1CF=CF2 AND DILUENT ARE SUBJECTED TO ULTRAVIOLET RADIATION IN THE RANGE OF 2000 A. TO 3000 A. AT A REACTION TEMPERATURE OF FROM 20*C. TO 250*C. AND AT A REACTION PRESSURE OF AT LEAST 1/2 ATMOSPHERE, AND WHEREIN SAID DILUENT HAS SUFFICIENT VAPOR PRESSURE AT THE REACTION TEMPERATURE TO PROVIDE THE REQUIRED CONCENTRATION OF DILUENT IN THE VAPOR PHASE AND SAID DILUENT AND R1CF=CF2 ARE DIFFERENT.
Claim 2
Dependent Claim
161 words
A PROCESS FOR PRODUCING: CF2 IN THE SINGLET STATE WHICH COMPRISES SUBJECTING TO ULTRAVIOLET RADIATION A COMPOUND OF THE FORMULA R1CF=CF2 AND FROM ONE TO ABOUT 50 MOLE PERCENT OF A DILUENT, SAID DILUENT BEING SELECTED FROM THE GROUP CONSISTING OF ALKANES, ALKENES AND COMPOUNDS OF THE FORMULA R2R3C=X, WHEREIN R1, R2, AND R3 ARE SELECTED FROM THE GROUP CONSISTING OF FLUORINE, CHLORINE, AND PERFLUROOALKYL GROUPS CONTAING 1 TO 10 CARBON ATOMS, AND X IS SELECTED FROM THE GROUP CONSISTING OF SULFUR, THE CFCI GROUP AND THE CR2 GROUP; WHEREIN SAID COMPOUND OF THE FORMULA R1CF=CF2 AND DILUENT ARE SUBJECTED TO ULTRAVIOLET RADIATION IN THE RANGE OF 2000 A. TO 3000 A. AT A REACTION TEMPERATURE OF FROM 20*C. TO 250*C. AND AT A REACTION PRESSURE OF AT LEAST 1/2 ATMOSPHERE, AND WHEREIN SAID DILUENT HAS SUFFICIENT VAPOR PRESSURE AT THE REACTION TEMPERATURE TO PROVIDE THE REQUIRED CONCENTRATION OF DILUENT IN THE VAPOR PHASE AND SAID DILUENT AND R1CF=CF2 ARE DIFFERENT.
References Cited (Backward Citations)
US2979539A
Cited
US3129248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |