Patent US2752321A successfully refreshed from Google Patents.
US2752321A
Expired / Lapsed
US
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Lubricating tetrafluoroethylene polymers
Assignee: EIDP Inc
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Filing: 1953-02-27
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Granted: 1956-06-26
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Expires: 1973-02-27
Abstract
No abstract record available.
Inventors
- 👤 George W Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; Y; Y10; Y10S; Y10S138/00; Y10S138/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE METHOD FOR LUBIRCATING PARTICULATE POLYTETRAFLUOROETHYLENE AND IMPROVING THE EXTRUDABILITY THEREOF WHICH COMPRISES ADMIXING PARTICLES CONSISTING ESSENTIALLY OF POLYTETRAFLUORETHYLENE WITH FROM 7 TO 45 CC. OF LUBRICATING ORGANIC LIQUID PER 100 GRAMS OF SAID POLYTETRAFLUOROETHYLENE, SAID LUBRICATING ORGANIC LIQUID CONSISTING ESSENTIALLY OF HYDROCARBON OIL, UNTIL A NON-UNIFORM FREE-FLOWING MASS OF POWDER AND LUBRICANT IS FORMED, AND THEREAFTER COMPRESSING THE SAID MASS INTO A CONFINING SPACE UNDER A PRESSURE OF AT LEAST 50 LBS/SQ. IN. UNTIL THE SAID LUBRICANT BECOMES UNIFORMLY DISTRIBUTED THROUGH THE MASS AS A RESULT OF THE SAID COMPRESSION, WHEREBY A PASTY MASS WHICH CAN BE READILY EXTRUDED IS OBTAINED, SAID LUBRICATING ORGANIC LIQUID HAVING A VISCOSITY WITHIN THE RANGE OF FROM 1 TO 100 CENTIPOISES.
Claim 2
Independent Claim
118 words
THE METHOD FOR LUBIRCATING PARTICULATE POLYTETRAFLUOROETHYLENE AND IMPROVING THE EXTRUDABILITY THEREOF WHICH COMPRISES ADMIXING PARTICLES CONSISTING ESSENTIALLY OF POLYTETRAFLUORETHYLENE WITH FROM 7 TO 45 CC. OF LUBRICATING ORGANIC LIQUID PER 100 GRAMS OF SAID POLYTETRAFLUOROETHYLENE, SAID LUBRICATING ORGANIC LIQUID CONSISTING ESSENTIALLY OF HYDROCARBON OIL, UNTIL A NON-UNIFORM FREE-FLOWING MASS OF POWDER AND LUBRICANT IS FORMED, AND THEREAFTER COMPRESSING THE SAID MASS INTO A CONFINING SPACE UNDER A PRESSURE OF AT LEAST 50 LBS/SQ. IN. UNTIL THE SAID LUBRICANT BECOMES UNIFORMLY DISTRIBUTED THROUGH THE MASS AS A RESULT OF THE SAID COMPRESSION, WHEREBY A PASTY MASS WHICH CAN BE READILY EXTRUDED IS OBTAINED, SAID LUBRICATING ORGANIC LIQUID HAVING A VISCOSITY WITHIN THE RANGE OF FROM 1 TO 100 CENTIPOISES.
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) | 1959-06-26 | 1959-12-26 | 1960-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-26 | 1963-12-26 | 1964-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-26 | 1967-12-26 | 1968-06-26 | $7700.00 | Window Closed / Lapsed |