US2689380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making bearings
Assignee: Federal Mogul Engineering Ltd
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Filing: 1951-01-29
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Granted: 1954-09-21
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Expires: 1971-01-29
Abstract
No abstract record available.
Inventors
- 👤 Tait William Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:17
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/003; B32; B32B; B32B15/00; B32B15/04; B32B15/08; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/203; F16C33/206; F16C33/208; B29K; B29K2027/00; B29K2027/12; B29K2027/18; F16C2208/00; F16C2208/20; F16C2208/30; F16C2208/32; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/908; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49705; Y10T29/49707; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/12458
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF PRODUCING A BEARING MATERIAL WHICH COMPRISES APPLYING A LAYER OF POLYTETRAFLUOROETHYLENE TO A SURFACE OF A CONTINUOUS METAL BODY HAVING CLOSELY SPACED CAVITIES IN AT LEAST SAID SURFACE, SAID CAVITIES BEING INTERCONNECTED BELOW SAID SURFACE AND SUBJECTING THE BODY WITH SAID LAYER TO HEAT AND PRESSURE TO FORCE THE POLYTETRAFLUOROETHYLENE INTO SAID CAVITIES INCLUDING THE INTERCONNECTING PORTIONS THEREOF.
Claim 2
Independent Claim
61 words
A METHOD OF PRODUCING A BEARING MATERIAL WHICH COMPRISES APPLYING A LAYER OF POLYTETRAFLUOROETHYLENE TO A SURFACE OF A CONTINUOUS METAL BODY HAVING CLOSELY SPACED CAVITIES IN AT LEAST SAID SURFACE, SAID CAVITIES BEING INTERCONNECTED BELOW SAID SURFACE AND SUBJECTING THE BODY WITH SAID LAYER TO HEAT AND PRESSURE TO FORCE THE POLYTETRAFLUOROETHYLENE INTO SAID CAVITIES INCLUDING THE INTERCONNECTING PORTIONS 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) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |