Patent US3287288A successfully refreshed from Google Patents.
US3287288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low friction composition containing a resinous binder and degraded polytetrafluoroethylene particles
Assignee: Flowserve Corp
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Filing: 1964-09-21
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Granted: 1966-11-22
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Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 Victor G Reiling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:16
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF FINELY DIVIDED DEGRADED POLYTETRAFLUOROETHYLENE RESIN PARTICLES AND A PARENT MATERIAL THEREFOR, SAID PARENT MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF THERMOSETTING AND THERMOPLASTIC RESINS AND COMBINATIONS THEREOF, SAID DEGRADED POLYTETRAFLUOROETHYLENE RESIN BEING FORMED BY HEATING POLYTETRAFLUOROETHYLENE RESIN STARTING MATERIAL AT A TEMPERATURE IN EXCESS OF 785*F. FOR A PERIOD OF TIME SUFFICIENT TO CAUSE APPRECIABLE DEGRADATION OF SAID POLYTETRAFLUOROETHYLENE STARTING MATERIAL TO A POINT SUCH THAT THE TENSILE STRENGTH OF THE DEGRADED POLYTETRAFLUOROETHYLENE IS PERMANENTLY SUBSTANTIALLY LESS THAN THAT OF THE STARTING MATERIAL, AND SAID DEGRADED RESIN PARTICLES BEING PRESENT IN AN AMOUNT OF 5 TO 50% BY VOLLUME OF SAID PARENT RESIN AND BEING UNIFORMLY AND EVENLY DISTRIBUTED THROUGHOUT SAID PARENT FOR REDUCING THE SURFACE FRICTION THEREOF.
Claim 2
Dependent Claim
126 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF FINELY DIVIDED DEGRADED POLYTETRAFLUOROETHYLENE RESIN PARTICLES AND A PARENT MATERIAL THEREFOR, SAID PARENT MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF THERMOSETTING AND THERMOPLASTIC RESINS AND COMBINATIONS THEREOF, SAID DEGRADED POLYTETRAFLUOROETHYLENE RESIN BEING FORMED BY HEATING POLYTETRAFLUOROETHYLENE RESIN STARTING MATERIAL AT A TEMPERATURE IN EXCESS OF 785*F. FOR A PERIOD OF TIME SUFFICIENT TO CAUSE APPRECIABLE DEGRADATION OF SAID POLYTETRAFLUOROETHYLENE STARTING MATERIAL TO A POINT SUCH THAT THE TENSILE STRENGTH OF THE DEGRADED POLYTETRAFLUOROETHYLENE IS PERMANENTLY SUBSTANTIALLY LESS THAN THAT OF THE STARTING MATERIAL, AND SAID DEGRADED RESIN PARTICLES BEING PRESENT IN AN AMOUNT OF 5 TO 50% BY VOLLUME OF SAID PARENT RESIN AND BEING UNIFORMLY AND EVENLY DISTRIBUTED THROUGHOUT SAID PARENT FOR REDUCING THE SURFACE FRICTION THEREOF.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |