US2593582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing tetrafluoroethylene polymer compositions
Assignee: EIDP Inc
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Filing: 1950-06-30
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Granted: 1952-04-22
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Expires: 1970-06-30
Abstract
No abstract record available.
Inventors
- 👤 Lontz John Frank
- 👤 Robb Lester Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR PREPARING A NON-AQUEOUS PRESSURE-COALESCING COMPOSITION WHICH COMPRISES CONTACTING DRY TETRAFLUOROETHYLENE POLYMER PARTICLES OF COLLOIDAL SIZE WITH AN ATMOSPHERE COMPRISING A MIST OF AT LEAST ONE ESSENTIALLY SATURATED HYDROCARBON HAWVING A BOILING POINT OF 220* C. TO 400* C. AT ATMOSPHERIC PRESSURE FROM THE GROUP CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC HYDROCARBONS, AND INTIMATELY MIXING SAID POLYMER PARTICLES AND HYDROCARBON, MIST UNTIL A UNIFORM INTIMATE MIXTURE IS OBTAINED IN THE FORM OF A DRY, FREE-FLOWING POWDER, THE WEIGHT OF SAID HYDROCARBON BEING FROM 15% TO 30% OF THE COMBINED WEIGHT OF SAID TETRAFLUOROETHYLENE POLYMER AND HYDROCARBON.
Claim 2
Dependent Claim
97 words
A PROCESS FOR PREPARING A NON-AQUEOUS PRESSURE-COALESCING COMPOSITION WHICH COMPRISES CONTACTING DRY TETRAFLUOROETHYLENE POLYMER PARTICLES OF COLLOIDAL SIZE WITH AN ATMOSPHERE COMPRISING A MIST OF AT LEAST ONE ESSENTIALLY SATURATED HYDROCARBON HAWVING A BOILING POINT OF 220* C. TO 400* C. AT ATMOSPHERIC PRESSURE FROM THE GROUP CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC HYDROCARBONS, AND INTIMATELY MIXING SAID POLYMER PARTICLES AND HYDROCARBON, MIST UNTIL A UNIFORM INTIMATE MIXTURE IS OBTAINED IN THE FORM OF A DRY, FREE-FLOWING POWDER, THE WEIGHT OF SAID HYDROCARBON BEING FROM 15% TO 30% OF THE COMBINED WEIGHT OF SAID TETRAFLUOROETHYLENE POLYMER AND HYDROCARBON.
References Cited (Backward Citations)
US2230654A
Cited
US2510078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |