US2782179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polytetrafluoroethylene-asbestos compositions
Assignee: EIDP Inc
•
Filing: 1953-01-14
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Granted: 1957-02-19
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Expires: 1973-01-14
Abstract
No abstract record available.
Inventors
- 👤 John F Lontz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:29
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/04; C04B26/08; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
PROCESS FOR PREPARING A COMPOSITION CAPABLE OF BEING MOLDED INTO ARTICLES HAVING HIGH STIFFNESS AND DIMENSIONAL STABILITY, WHICH PROCESS COMPRISES ADDING TOGETHER IN AN AQUEOUS MEDIUM 80 TO 25 PARTS BY WEIGHT OF TETRAFLUOROETHYLENE HOMOPOLYMER PARTICLES OF COLLOIDAL SIZE AND 20 TO 75 PARTS BY WEIGHT OF FINELY DISPERSIBLE ASBESTOS UNTIL A HOMOGENEOUS MIXTURE OF THE TWO WET SOLIDS ID OBTAINED, THEN COAGULATING THE POLYMER PARTICLES, REMOVING THE AQUEOUS MEDIUM AND DRYING THE SOLID MIXTURE.
Claim 2
Dependent Claim
75 words
PROCESS FOR PREPARING A COMPOSITION CAPABLE OF BEING MOLDED INTO ARTICLES HAVING HIGH STIFFNESS AND DIMENSIONAL STABILITY, WHICH PROCESS COMPRISES ADDING TOGETHER IN AN AQUEOUS MEDIUM 80 TO 25 PARTS BY WEIGHT OF TETRAFLUOROETHYLENE HOMOPOLYMER PARTICLES OF COLLOIDAL SIZE AND 20 TO 75 PARTS BY WEIGHT OF FINELY DISPERSIBLE ASBESTOS UNTIL A HOMOGENEOUS MIXTURE OF THE TWO WET SOLIDS ID OBTAINED, THEN COAGULATING THE POLYMER PARTICLES, REMOVING THE AQUEOUS MEDIUM AND DRYING THE SOLID MIXTURE.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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 |