US3053593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytetrafluoroethylene bushings and washers and method of forming same
Assignee: Chicago Rawhide Manufacturing Co Inc
•
Filing: 1959-05-27
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Granted: 1962-09-11
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Expires: 1979-05-27
Abstract
No abstract record available.
Inventors
- 👤 Richard W Blair
- 👤 Donald L Johnson
- 👤 James P Morley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:05
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/20; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A POLYTETRAFLUOROETHYLENE ELEMENT FOR USE AS A BEARING MEMBER, SAID ELEMENT PROVIDED WITH A PLURALITY OF PASSAGES AND INTERCONNECTED VOIDS THEREIN WHICH IMPART SUBSTANTIAL POROSITY THERETO, AND METALLIC MATERIAL AT LEAST SUBSTANTIALLY FILLING SAID PASSAGES AND INTERCONNECTED VOIDS FOR THE CONDUCTION OF HEAT THROUGH SAID ELEMENT, SAID METALLIC MATERIAL EXTENDING OUT OF SAID PASSAGES AND VOIDS CONTINUOUSLY ALONG A SURFACE OF SAI D ELEMENT AND FORMING A SHELL THEREOF WHICH SHELL IS INTERGRALLY CONNECTED WITH THE METALLIC MATERIAL IN SAID PASSAGES AND VOIDS THROUGHOUT SAID ELEMENT.
Claim 2
Dependent Claim
86 words
A POLYTETRAFLUOROETHYLENE ELEMENT FOR USE AS A BEARING MEMBER, SAID ELEMENT PROVIDED WITH A PLURALITY OF PASSAGES AND INTERCONNECTED VOIDS THEREIN WHICH IMPART SUBSTANTIAL POROSITY THERETO, AND METALLIC MATERIAL AT LEAST SUBSTANTIALLY FILLING SAID PASSAGES AND INTERCONNECTED VOIDS FOR THE CONDUCTION OF HEAT THROUGH SAID ELEMENT, SAID METALLIC MATERIAL EXTENDING OUT OF SAID PASSAGES AND VOIDS CONTINUOUSLY ALONG A SURFACE OF SAI D ELEMENT AND FORMING A SHELL THEREOF WHICH SHELL IS INTERGRALLY CONNECTED WITH THE METALLIC MATERIAL IN SAID PASSAGES AND VOIDS THROUGHOUT SAID ELEMENT.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |