US2820019A
Expired / Lapsed
US
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Process for preparing a concentrated organic colloidal polymeric chlorotrifluoroethylene suspension
Assignee: General Electric Co
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Filing: 1953-06-05
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Granted: 1958-01-14
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Expires: 1973-06-05
Abstract
No abstract record available.
Inventors
- 👤 Eustance John Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:36
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J2327/00; C08J2327/02; C08J2327/12; Y; Y10; Y10S; Y10S524/00; Y10S524/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE PROCESS FOR PREPARING A CONCENTRATED ORGANIC COLLOIDAL POLYCHLOROTIRIFLUOROETHYLENE SUSPENSION WHICH COMPRISES ADDING A WATER-IMMISCIBLE ORGANIC LIQUID COMPOUND WHICH IS SUBSTANTIALLY A NON-SOLVENT FOR THE POLYMER AT THE TEMPERATURE OF TRANSFER TO A DILUTE AQUEOUS SUSPENSION OF POLYCHLOROTRIFLUOROETHYLENE, ADDING A STRONG ELECTROLYTE TO THE RESULTING TWO-PHASE SYSTEM, AGITATING SAID SYSTEM TO FLOCCULATE SAID POLYCHLOROTRIFLUOROETHYLENE AND ALLOWING SAID FLOCCULATED POLYCHLOROTRIFLUOROETHYLENE TO TRANSFER FROM THE AQUEOUS PHASE TO THE ORGANIC PHASE BY SETTLING TO A FORM A CONCENTRATED ORGANIC COLLOIDAL SUSPENSION.
Claim 2
Dependent Claim
79 words
THE PROCESS FOR PREPARING A CONCENTRATED ORGANIC COLLOIDAL POLYCHLOROTIRIFLUOROETHYLENE SUSPENSION WHICH COMPRISES ADDING A WATER-IMMISCIBLE ORGANIC LIQUID COMPOUND WHICH IS SUBSTANTIALLY A NON-SOLVENT FOR THE POLYMER AT THE TEMPERATURE OF TRANSFER TO A DILUTE AQUEOUS SUSPENSION OF POLYCHLOROTRIFLUOROETHYLENE, ADDING A STRONG ELECTROLYTE TO THE RESULTING TWO-PHASE SYSTEM, AGITATING SAID SYSTEM TO FLOCCULATE SAID POLYCHLOROTRIFLUOROETHYLENE AND ALLOWING SAID FLOCCULATED POLYCHLOROTRIFLUOROETHYLENE TO TRANSFER FROM THE AQUEOUS PHASE TO THE ORGANIC PHASE BY SETTLING TO A FORM A CONCENTRATED ORGANIC COLLOIDAL SUSPENSION.
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) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |