Patent US2992280A successfully refreshed from Google Patents.
US2992280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of fluoroform
Assignee: Dow Chemical Co
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Filing: 1959-06-04
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Granted: 1961-07-11
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Expires: 1979-06-04
Abstract
No abstract record available.
Inventors
- 👤 Olstowski Franciszek
- 👤 Watson John Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:11
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS OF PREPARING FLUOROFORM WHICH COMPRISES CONTACTING HYDROGEN AND CARBON TETRAFLUORIDE AT A TEMPERATURE RANGING FROM ABOUT 1700*C. TO ABOUT 2100*C. FOR A CONTACT TIME RANGING FROM ABOUT 0.001 SECOND TO ABOUT 1.0 SECOND, RAPIDLY COOLING THE REACTION VAPORS BELOW 600*C. WITHIN THE TIME INTERVAL OF FROM ABOUT 0.001 SECOND TO ABOUT 1.0 SECOND, AND SEPARATING FLUOROFORM FROM THE REACTION PRODUCT.
Claim 2
Dependent Claim
62 words
A PROCESS OF PREPARING FLUOROFORM WHICH COMPRISES CONTACTING HYDROGEN AND CARBON TETRAFLUORIDE AT A TEMPERATURE RANGING FROM ABOUT 1700*C. TO ABOUT 2100*C. FOR A CONTACT TIME RANGING FROM ABOUT 0.001 SECOND TO ABOUT 1.0 SECOND, RAPIDLY COOLING THE REACTION VAPORS BELOW 600*C. WITHIN THE TIME INTERVAL OF FROM ABOUT 0.001 SECOND TO ABOUT 1.0 SECOND, AND SEPARATING FLUOROFORM FROM THE REACTION PRODUCT.
References Cited (Backward Citations)
US2494064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |