US3234128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plain bearings
Assignee: Federal Mogul Engineering Ltd
•
Filing: 1961-01-09
•
Granted: 1966-02-08
•
Expires: 1981-01-09
Abstract
No abstract record available.
Inventors
- 👤 Francis J Mcleish
- 👤 George C Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:29
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/02; C08K3/08; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; F16C2208/00; F16C2208/20; F16C2208/30; F16C2208/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PLAIN BEARING MATERIAL COMPRISING BETWEEN 40% AND 60% BY VOLUME OF POLYTETRAFLUOROETHYLENE, IN WHICH IS INCORPORATED BETWEEN 25% AND 40% BY VOLUME OF A FILLER SELECTED FROM THE GROUP CONSISTING OF LEAD AND AN OXIDE OF LEAD, AND BETWEEN 1% AND 10% OF A FILLER SELECTED FROM THE GROUP CONSISTING OF COPPER, AN OXIDE OF COPPER, ZINC COPPER ALLOY, TIN COPPER ALLOY, ALUMINUM COPPER ALLOY, AND SILICON COPPER ALLOY.
Claim 2
Dependent Claim
70 words
A PLAIN BEARING MATERIAL COMPRISING BETWEEN 40% AND 60% BY VOLUME OF POLYTETRAFLUOROETHYLENE, IN WHICH IS INCORPORATED BETWEEN 25% AND 40% BY VOLUME OF A FILLER SELECTED FROM THE GROUP CONSISTING OF LEAD AND AN OXIDE OF LEAD, AND BETWEEN 1% AND 10% OF A FILLER SELECTED FROM THE GROUP CONSISTING OF COPPER, AN OXIDE OF COPPER, ZINC COPPER ALLOY, TIN COPPER ALLOY, ALUMINUM COPPER ALLOY, AND SILICON COPPER ALLOY.
References Cited (Backward Citations)
US2332733A
Cited
US2416480A
Cited
US2400099A
Cited
US2585430A
Cited
US2581301A
Cited
US2689380A
Cited
US2698966A
Cited
US2691814A
Cited
US2777783A
Cited
US2799080A
Cited
US2824060A
Cited
US2865692A
Cited
US2807510A
Cited
US2956848A
Cited
US3122505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |