US2842528A
Expired / Lapsed
US
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Polymerization of fluorine-containing ethylenically unsaturated compounds
Assignee: 3M Co
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Filing: 1955-03-29
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Granted: 1958-07-08
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Expires: 1975-03-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph L Herbst
- 👤 Billy F Landrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:02
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
A PROCESS WHICH COMPRISES POLYMERIZING TRIFLUOROCHLOROETHYLENE IN AN AQUEOUS SUSPENSION MEDIUM HAVING A PH BETWEEN ABOUT 1 AND ABOUT 4 CONSISTING ESSENTIALLY OF WATER IN A RATIO IN EXCESS OF 1:1 TO MONOMER, AND COMPRISING WATER, TERTIARY BUTYL PERACETATE, SODIUM BISULFITE, AND A WATER SOLUBLE SALT OF IRON.
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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |