US3242166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis (perfluoroalkyl) diazomethane and preparation thereof
Assignee: EIDP Inc
•
Filing: 1965-05-26
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Granted: 1966-03-22
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Expires: 1985-05-26
Abstract
No abstract record available.
Inventors
- 👤 Carl G Krespan
- 👤 William J Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:07
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; C07; C07C; C07C17/00; C07C17/26; C07C17/263; C08J2359/00; C08J2359/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
23 words
A COMPOUND OF THE FORMULA RFRF''CN2 WHEREIN RF AND RF'' EACH REPRESENT A PERFLUOROALKYL GROUP OF UP TO AND INCLUDING SIX CARBON ATOMS.
Claim 2
Dependent Claim
23 words
A COMPOUND OF THE FORMULA RFRF''CN2 WHEREIN RF AND RF'' EACH REPRESENT A PERFLUOROALKYL GROUP OF UP TO AND INCLUDING SIX CARBON ATOMS.
Claim 3
Dependent Claim
45 words
PROCESS WHICH COMPRISES OXIDIZING A HYDRAZONE OF THE FORMULA RFRF''C=N-NH2 WHEREIN RF AND RF'' EACH REPRESENT A LWOER PERFLUOROALKYL GROUP BY CONTACTING SAME WITH LEAD TETRAACETATE IN AN ORGANIC REACTION MEDIUM, UNDER ANHYDROUS CONDITIONS, AND AT A TEMPERATURE IN THE RANGE OF -25*C. TO 100*C.
Claim 4
Dependent Claim
45 words
PROCESS WHICH COMPRISES OXIDIZING A HYDRAZONE OF THE FORMULA RFRF''C=N-NH2 WHEREIN RF AND RF'' EACH REPRESENT A LWOER PERFLUOROALKYL GROUP BY CONTACTING SAME WITH LEAD TETRAACETATE IN AN ORGANIC REACTION MEDIUM, UNDER ANHYDROUS CONDITIONS, AND AT A TEMPERATURE IN THE RANGE OF -25*C. TO 100*C.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |