Patent US2691814A successfully refreshed from Google Patents.
US2691814A
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Polytetrafluorethylene impregnated bearings
Assignee: Federal Mogul Engineering Ltd
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Filing: 1952-11-24
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Granted: 1954-10-19
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Expires: 1972-11-24
Abstract
No abstract record available.
Inventors
- 👤 Tait William Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:23
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/203; F16C33/206; F16C2208/00; F16C2208/20; F16C2208/30; F16C2208/32; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/936; Y10S277/939; Y10S277/944; Y10S277/945; Y10S277/946; Y10S384/00; Y10S384/90; Y10S384/902; Y10S384/908; Y10S403/00; Y10S403/02; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49702; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/12479; Y10T428/12493; Y10T428/12535; Y10T428/12556
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A LUBRICANT-FREE BEARING MATERIAL COMPRISING A CONTINUOUS SPONGIFORM METALLIC STRUCTURE IN WHICH THE MAJORITY OF THE INTERSTICES WHICH OPEN AT THE SURFACE OF THE STRUCTURE ARE INTERCONNECTED BENEATH THE SURFACE AND ARE FILLED TO A SUBSTANTIAL DEPTH WITH POLYTETRAFLUOROETHYLENE.
Claim 2
Dependent Claim
39 words
A LUBRICANT-FREE BEARING MATERIAL COMPRISING A CONTINUOUS SPONGIFORM METALLIC STRUCTURE IN WHICH THE MAJORITY OF THE INTERSTICES WHICH OPEN AT THE SURFACE OF THE STRUCTURE ARE INTERCONNECTED BENEATH THE SURFACE AND ARE FILLED TO A SUBSTANTIAL DEPTH WITH POLYTETRAFLUOROETHYLENE.
References Cited (Backward Citations)
US2187086A
Cited
US2431430A
Cited
US2352958A
Cited
US2400091A
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US2497046A
Cited
US2470264A
Cited
US2615768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |