US2782174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersions of perfluorocarbon polymers
Assignee: MW Kellogg Co
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Filing: 1952-10-08
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Granted: 1957-02-19
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Expires: 1972-10-08
Abstract
No abstract record available.
Inventors
- 👤 Alexander C Hetherington
- 👤 Wilber O Teeters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J2327/00; C08J2327/02; C08J2327/12; Y; Y10; Y10S; Y10S526/00; Y10S526/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A COMPOSITION COMPRISING FINELY DIVIDED SOLID PARTICLES OF PLASTIC POLYTRIFLUOROCHLOROETHYLENE AND NOT MORE THAN 20% BY WEIGHT OF A SUBSTANTIALLY NON-SOLVENT, NORMALLY LIQUID DISPERINF MEDIUM, SAID COMPOSITION BEING READILY DISPERSIBLE BY STIRRING ALONE IN A SUBSTANTIALLY NON-SOLVENT, NORMALLY LIQUID DISPERSING MEDIUM TO PRODDUCE A STABLE DISPERSION AND HAVING BEEN PREPARED BY A PROCESS COMPRISING THE REMOVAL OF THE GREATER PORTION OF SAID LIQUID DISPERSING MEDIUM FROM A DISPERSION PREPARED BY MILLING SAID PLASTIC POLYTRIFLUOROCHLOROETHYLENE IN SAID LIQUID DISPERSING MEDIUM.
Claim 2
Dependent Claim
79 words
A COMPOSITION COMPRISING FINELY DIVIDED SOLID PARTICLES OF PLASTIC POLYTRIFLUOROCHLOROETHYLENE AND NOT MORE THAN 20% BY WEIGHT OF A SUBSTANTIALLY NON-SOLVENT, NORMALLY LIQUID DISPERINF MEDIUM, SAID COMPOSITION BEING READILY DISPERSIBLE BY STIRRING ALONE IN A SUBSTANTIALLY NON-SOLVENT, NORMALLY LIQUID DISPERSING MEDIUM TO PRODDUCE A STABLE DISPERSION AND HAVING BEEN PREPARED BY A PROCESS COMPRISING THE REMOVAL OF THE GREATER PORTION OF SAID LIQUID DISPERSING MEDIUM FROM A DISPERSION PREPARED BY MILLING SAID PLASTIC POLYTRIFLUOROCHLOROETHYLENE IN SAID LIQUID DISPERSING MEDIUM.
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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) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |