US3752796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel polytetrafluoroethylene prepared in the presence of a fluoroalkanoic acid salt dispersing agent and octafluorocyclobutane
Assignee: Solvay Solexis Inc
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Filing: 1970-11-19
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Granted: 1973-08-14
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Expires: 1990-11-19
Abstract
Abstract PARTICULATE POLYTETRAFLUOROETHYLENE DISPERSION RESIN CHARACTERIZED BY HIGH MOLECULAR WEIGHT, RELATIVELY LARGE PARTICLE SIZE, UNIFORM SPHERICAL PARTICLE SHAPE AND NARROW PARTICLE SIZE DISTRIBUTION, WHICH IS SUITABLE FOR MAKING STABLE CONCENTRATED AQUEOUS POLYTETRAFLUOROETHYLENE DISPERSIONS OF CONCENTRATIONS HIGHER THAN HERETOFORE AVAILABLE, IS MADE BY POLYMERIZATION OF TETRAFLUOROETHYLENE IN AQUEOUS DISPERSION IN THE CONJOINT PRESENCE OF LIQUID OCTAFLUOROCYCLOBUTANE AND CERTAIN POLYFLUORINATED CARBOXYLIC ACID SALT DISPERSING AGENTS, USING WATER-SOLUBLE PEROXIDE INITIATORS.
Inventors
- 👤 M Mueller
- 👤 P Salatiello
- 👤 D Sawhney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:40
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08F; C08F6/00; C08F6/14; C08F6/20; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; Y; Y10; Y10S; Y10S526/00; Y10S526/909; Y10S526/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |