Patent US3218255A successfully refreshed from Google Patents.
US3218255A
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Bearing composition containing polytetrafluoroethylene and ammonium manganese orthophosphate
Assignee: Federal Mogul Engineering Ltd
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Filing: 1961-01-09
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Granted: 1965-11-16
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Expires: 1981-01-09
Abstract
No abstract record available.
Inventors
- 👤 George C Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:58
CPC Classifications
C; C08; C08K; C08K3/00; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; F16C2208/00; F16C2208/20; F16C2208/30; F16C2208/32; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49709; Y10T29/4971; Y10T428/00; Y10T428/12; Y10T428/12007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PLAIN BEARING MATERIAL CONSISTING ESSENTIALLY OF AT LEAST 40% BY VOLUME OF POLYTETRAFLUOROETHYLENE, FROM 2.5 TO 40% BY VOLUME OF A MEMBER SELECTED FROM A GROUP CONSISTING OF LEAD AND OXIDES OF LEAD, AND FROM 2.5 TO 40% BY VOLUME OF AMMONIUM MANGANESE ORTHOPHOSPHATE.
Claim 2
Dependent Claim
45 words
A PLAIN BEARING MATERIAL CONSISTING ESSENTIALLY OF AT LEAST 40% BY VOLUME OF POLYTETRAFLUOROETHYLENE, FROM 2.5 TO 40% BY VOLUME OF A MEMBER SELECTED FROM A GROUP CONSISTING OF LEAD AND OXIDES OF LEAD, AND FROM 2.5 TO 40% BY VOLUME OF AMMONIUM MANGANESE ORTHOPHOSPHATE.
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |