Patent US2831902A successfully refreshed from Google Patents.
US2831902A
Expired / Lapsed
US
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Separation of 2-fluoropropene
Assignee: Dow Chemical Co
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Filing: 1957-01-18
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Granted: 1958-04-22
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Expires: 1977-01-18
Abstract
No abstract record available.
Inventors
- 👤 Dallas E Hamilton
- 👤 Thomas J Cogdell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:13
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/07; C07C17/08; C07C17/38; C07C17/383; C07C17/386
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
THE PROCESS WHICH COMPRISES MIXING AMMONIA WITH A MIXTURE OF METHYLACETYLENE, PROPADIENE, 2-FLUOROPROPENE AND 2,2-DIFLUOROPROPANE, AND DISTILLING THE RESULTING MIXTURE TO SEPERATELY REMOVE THE AZEOTROPES THEREFROM.
Claim 2
Dependent Claim
26 words
THE PROCESS WHICH COMPRISES MIXING AMMONIA WITH A MIXTURE OF METHYLACETYLENE, PROPADIENE, 2-FLUOROPROPENE AND 2,2-DIFLUOROPROPANE, AND DISTILLING THE RESULTING MIXTURE TO SEPERATELY REMOVE THE AZEOTROPES THEREFROM.
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) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |