US2788375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen free halopolyfluoro compounds and method of producing same
Assignee: Individual
•
Filing: 1951-03-13
•
Granted: 1957-04-09
•
Expires: 1971-03-13
Abstract
No abstract record available.
Inventors
- 👤 Robert L Ehrenfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:10
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/278
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
THE METHOD OF PRODUCING AN OXYGEN-FREE MIXTURE OF SATURATED BROMOPOLYFLUORO COMPOUNDS REPRESENTED BY THE FORMULA BR(CF2CFCL)NCL3 WHICH COMPRISES REACTING CF2=CFCL AND CBRCL3 IN A REACTION VESSEL UNDER PRESSURE WITH AGITATION AND UNDER THE INFLUENCE OF ACTINIC RAYS AS RESULT FROM A MERCURY ARCH LAMP.
Claim 2
Independent Claim
44 words
THE METHOD OF PRODUCING AN OXYGEN-FREE MIXTURE OF SATURATED BROMOPOLYFLUORO COMPOUNDS REPRESENTED BY THE FORMULA BR(CF2CFCL)NCL3 WHICH COMPRISES REACTING CF2=CFCL AND CBRCL3 IN A REACTION VESSEL UNDER PRESSURE WITH AGITATION AND UNDER THE INFLUENCE OF ACTINIC RAYS AS RESULT FROM A MERCURY ARCH LAMP.
Claim 3
Dependent Claim
10 words
THE OXYGEN-FREE MIXTURE OF COMPOUNDS REPRESENTED BY THE GENERAL FORMULA
Claim 4
Dependent Claim
10 words
THE OXYGEN-FREE MIXTURE OF COMPOUNDS REPRESENTED BY THE GENERAL FORMULA
References Cited (Backward Citations)
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Cited
US2562547A
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US2468208A
Cited
US2579437A
Cited
US2636907A
Cited
US2609402A
Cited
US2636908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |