US2689241A
Expired / Lapsed
US
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Polymerization of fluorine-containing monomers in aqueous redox system
Assignee: MW Kellogg Co
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Filing: 1951-03-02
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Granted: 1954-09-14
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Expires: 1971-03-02
Abstract
No abstract record available.
Inventors
- 👤 Albert L Dittman
- 👤 Herbert J Passino
- 👤 John M Wrightson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:40
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE PRODUCTION OF POLYTRIFLUOROCHLOROETHYLENE WHICH COMPRISES POLYMERIZING TRIFLUOROCHLOROETHYLENE IN A REACTION ZONE IN THE PRESENCE OF AN AQUEOUS SUSPENSION MEDIUM CONTAINING POTASSIUM PERSULFATE AS A PROMOTER, SODIUM BISULFITE AS AN ACTIVATOR AND BETWEEN ABOUT 10 AND ABOUT 300 P.P.M OF A WATER SOLUBLE SALT OF IRON CALCULATED AS IRON AS AN ACCELERATOR UNDER CONDITIONS TO PRODUCE A POLYMER AND MAINTAINING THE PH OF THE AQUEOUS SUSPENSION MEDIUM BETWEEN ABOUT 1 AND ANOUT 4.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE PRODUCTION OF POLYTRIFLUOROCHLOROETHYLENE WHICH COMPRISES POLYMERIZING TRIFLUOROCHLOROETHYLENE IN A REACTION ZONE IN THE PRESENCE OF AN AQUEOUS SUSPENSION MEDIUM CONTAINING POTASSIUM PERSULFATE AS A PROMOTER, SODIUM BISULFITE AS AN ACTIVATOR AND BETWEEN ABOUT 10 AND ABOUT 300 P.P.M OF A WATER SOLUBLE SALT OF IRON CALCULATED AS IRON AS AN ACCELERATOR UNDER CONDITIONS TO PRODUCE A POLYMER AND MAINTAINING THE PH OF THE AQUEOUS SUSPENSION MEDIUM BETWEEN ABOUT 1 AND ANOUT 4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |