Patent US2996527A successfully refreshed from Google Patents.
US2996527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of bis (polyfluoroalkyl) acetylenes with phosphorus, arsenic and antimony
Assignee: EIDP Inc
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Filing: 1959-06-26
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Granted: 1961-08-15
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Expires: 1979-06-26
Abstract
No abstract record available.
Inventors
- 👤 Krespan Carl George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:25
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/59; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6568; C07F9/65683; C07F9/66; C07F9/70; C07F9/90; C08F; C08F2/00; C08F2/38; C08K5/49; C08K5/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
8 words
A COMPOUND REPRESENTED BY THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
8 words
A COMPOUND REPRESENTED BY THE FOLLOWING STRUCTURAL FORMULA:
Claim 3
Dependent Claim
68 words
A PROCESS FOR MAKING NOVEL HIGHLY FLUORINATED UNSATURATED HETEROCYCLIC COPOUND WHICH COMPRISES HEATING AT A TEMPERATURE OF AT LEAST 150*C. AND NOT EXCEEDING ABOUT 400*C., A MIXTURE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHOURUS, ARSENIC, AND ANTIMONY WITH A COMPOUND OF THE FORMULA R-C$C-R WHEREIN EACH RR CONTAINS FROM 1-12 CARBON ATOMS AND IS SELECTED FROM THE GROUP CONSISTING OF PERFLUOROALKYL, WCHLOROPERFLUOROALKYL AND W-HYDROPERFLUOROALKYL RADICALS.
Claim 4
Dependent Claim
68 words
A PROCESS FOR MAKING NOVEL HIGHLY FLUORINATED UNSATURATED HETEROCYCLIC COPOUND WHICH COMPRISES HEATING AT A TEMPERATURE OF AT LEAST 150*C. AND NOT EXCEEDING ABOUT 400*C., A MIXTURE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHOURUS, ARSENIC, AND ANTIMONY WITH A COMPOUND OF THE FORMULA R-C$C-R WHEREIN EACH RR CONTAINS FROM 1-12 CARBON ATOMS AND IS SELECTED FROM THE GROUP CONSISTING OF PERFLUOROALKYL, WCHLOROPERFLUOROALKYL AND W-HYDROPERFLUOROALKYL RADICALS.
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |