Patent US3177274A successfully refreshed from Google Patents.
US3177274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making bearings and bearing material for such bearings
Assignee: Federal Mogul Engineering Ltd
•
Filing: 1962-08-06
•
Granted: 1965-04-06
•
Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Pratt George Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:59
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32; C08K3/18; C08K3/20; C08K3/22; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF MAKING A PLAIN BEARING OR BEARING MATERIAL OF POLYETHYLENE, LEAD MONOXIDE AND AMMONIUM MANGANESE PHOSPHATE, THE POLYETHYLENE HAVING A MOLECULAR WEIGHT GREATER THAN 500,000 IN WHICH THE THREE INGREDIENTS IN POWDERED FORM ARE INTIMATELY MIXED, THE MIXTURE IS PRESSED AT A PRESSURE EXCEEDING 2,000 POUNDS PER SQUARE INCH TO PRODUCE A PRE-PRESSED MATERIAL, THE PRE-PRESSED MATERIAL IS POWDERED INTO GRANULES LARGER THAN THE ORIGNAL POWDERS AND CONTAINING THE MIXED INGREDIENTS AND THEN PRESSED INTO THE REQUIRED FORM AND SINTERED AT A TEMPERATURE BETWEEN 140*C. AND 200*C.
Claim 2
Independent Claim
89 words
A METHOD OF MAKING A PLAIN BEARING OR BEARING MATERIAL OF POLYETHYLENE, LEAD MONOXIDE AND AMMONIUM MANGANESE PHOSPHATE, THE POLYETHYLENE HAVING A MOLECULAR WEIGHT GREATER THAN 500,000 IN WHICH THE THREE INGREDIENTS IN POWDERED FORM ARE INTIMATELY MIXED, THE MIXTURE IS PRESSED AT A PRESSURE EXCEEDING 2,000 POUNDS PER SQUARE INCH TO PRODUCE A PRE-PRESSED MATERIAL, THE PRE-PRESSED MATERIAL IS POWDERED INTO GRANULES LARGER THAN THE ORIGNAL POWDERS AND CONTAINING THE MIXED INGREDIENTS AND THEN PRESSED INTO THE REQUIRED FORM AND SINTERED AT A TEMPERATURE BETWEEN 140*C. AND 200*C.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |