US2774751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of fluorine containing polymers
Assignee: MW Kellogg Co
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Filing: 1953-06-11
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Granted: 1956-12-18
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Expires: 1973-06-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Passino
- 👤 Albert L Dittman
- 👤 John M Wrightson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:19
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR THE PRODUCTION OF A NORMALLY SOLID FLUORINE-CONTAINING POLYMER WHICH COMPRISES POLYMERIZING A SUBSTITUTED ETHYLENE COMPOUND HAVING AT LEAST 2 FLUORINE ATOMS IN THE MOLECULE AT A TEMPERATURE ABOVE ABOUT 0* C. AND BELOW 40* C. IN THE PRESENCE OF AN AQUEOUS-SUSPENSION MEDIUM HAVING A WATER-SOLUBLE INORGANIC PEROXIDE AS A POLYMERIZATION PROMOTER, A WATERSOLUBLE REDUCING AGENT AS AN ACTIVATOR, SELECTED FROM THE GROUP CONSISTING OF ALKALI BISULFITES, ALKALI HYDROSULFITES, ALKALI THIOSULFATES AND TRIMETHYLAMINE AND AN AMOUNT OF A WATER-SOLUBLE IODIDE AS AN ACCELERATOR WITHIN A RANGE BETWEEN ABOUT 1 AND 1000 P.P.M. CALCULATED AS IODINE.
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE PRODUCTION OF A NORMALLY SOLID FLUORINE-CONTAINING POLYMER WHICH COMPRISES POLYMERIZING A SUBSTITUTED ETHYLENE COMPOUND HAVING AT LEAST 2 FLUORINE ATOMS IN THE MOLECULE AT A TEMPERATURE ABOVE ABOUT 0* C. AND BELOW 40* C. IN THE PRESENCE OF AN AQUEOUS-SUSPENSION MEDIUM HAVING A WATER-SOLUBLE INORGANIC PEROXIDE AS A POLYMERIZATION PROMOTER, A WATERSOLUBLE REDUCING AGENT AS AN ACTIVATOR, SELECTED FROM THE GROUP CONSISTING OF ALKALI BISULFITES, ALKALI HYDROSULFITES, ALKALI THIOSULFATES AND TRIMETHYLAMINE AND AN AMOUNT OF A WATER-SOLUBLE IODIDE AS AN ACCELERATOR WITHIN A RANGE BETWEEN ABOUT 1 AND 1000 P.P.M. CALCULATED AS IODINE.
References Cited (Backward Citations)
US2569524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |