US2668864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making perfluoro olefins
Assignee: 3M Co
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Filing: 1951-11-26
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Granted: 1954-02-09
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Expires: 1971-11-26
Abstract
No abstract record available.
Inventors
- 👤 Lyle J Hals
- 👤 Thomas S Reid
- 👤 George H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:09
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/361; C07C17/363
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A DRY-REACTION PROCESS OF MAKING PERFLUORO MONOOLEFINS FROM ALKALI-METAL SALTS OF PERFLUOROAKLYL MONOCARBOXYLIC ACIDS HAVING FROM THREE TO TEN CARBON ATOMS IN THE MOLECULE, WHICH COMPRISES HEATING THE SALT, IN AN ANHYDROUS STATE AND IN THE ABSENCE OF HYROXYL COMPOUNDS, AT A DECOMPOSITION TEMPERATURE OF THE ORDER OF 200 TO 350* C. AT WHICH CONTROLLED DECOMPOSITION OCCURS AND UNTIL A HIGH YIELD OF PERFLUORO OLEFIN PRODUCT IS OBTAINED, AND RECOVERING THE LATTER.
References Cited (Backward Citations)
US2601536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |