US3637569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing fluorocarbon resin organosols
Assignee: EIDP Inc
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Filing: 1970-07-01
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Granted: 1972-01-25
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Expires: 1990-07-01
Abstract
Abstract A PROCESS FOR PREPARING A DISPERSION OF TETRAFLUROETHYLENE/HEXAFLUOROPROPYLENE COPOLYMER IN AN ORGANIC LIQUID, WHICH COMPRISES MIXING AN ORGANIC LIQUID WITH AN AQUEOUS DISPERSION OF COPOLYMER, BOILING THE MIXTURE, TAKING OFF THE RESULTING AZEOTROPE, SEPARATING THE WATER FROM THE AZEOTROPE AND RETURNING THE ORGANIC LIQUID TO THE BOILING MASS UNTIL IT IS SUBSTANTIALLY ANHYDROUS.
Inventors
- 👤 James C Fang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:48
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J2327/00; C08J2327/02; C08J2327/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |