US2813041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating porous metal strip with polytetrafluoroethylene
Assignee: Federal Mogul Engineering Ltd
•
Filing: 1954-08-30
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Granted: 1957-11-12
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Expires: 1974-08-30
Abstract
No abstract record available.
Inventors
- 👤 Mitchell David Conrad
- 👤 Starkey Donald Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:03
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; B05D5/00; B05D5/08; B05D5/083; B32; B32B; B32B15/00; B32B15/04; B32B15/08; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; F16C33/208; F16C2202/00; F16C2202/50; F16C2208/00; F16C2208/20; F16C2208/30; F16C2208/32; F16C2240/00; F16C2240/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD FOR THE PRODUCTION OF CONTINUOUS STRIP MATERIAL ADAPTED FOR THE MANUFACTURE OF PLAIN BEARING WHICH COMPRISES DEPOSITING A COATING OF POLYTETRAFLUOROETHYLENE IS FINELY DIVIDED FORM ON A CONTINUOUS METAL STRIP HAVING A POROUS SPONGE STRUCTURE, THE PARTICLE SIZE OF POLYTETRAFLUOROETHYLENE BEING NOT MORE THAN ONE TENTH OF THE PORE SIZE OF THE SPONGE STRUCTURE, PRESSING THE FINE PARTICLES INTO THE PORES BY THE APPLICATION OF PRESSURE INSUFFICIENT TO COMPLETELY CLOSE THE PORES OF THE METAL STRIP, AND HEATING THE PRESSED STRIP TO A TEMPERATURE OF 327* C. TO 450*C. FOR A PERIOD SUFFICIENT TO FUSE TOGETHER THE PARTICLES OF POLYTETRAFLUOROETHYLENE SO AS TO FORM A CON-
Claim 2
Independent Claim
108 words
A METHOD FOR THE PRODUCTION OF CONTINUOUS STRIP MATERIAL ADAPTED FOR THE MANUFACTURE OF PLAIN BEARING WHICH COMPRISES DEPOSITING A COATING OF POLYTETRAFLUOROETHYLENE IS FINELY DIVIDED FORM ON A CONTINUOUS METAL STRIP HAVING A POROUS SPONGE STRUCTURE, THE PARTICLE SIZE OF POLYTETRAFLUOROETHYLENE BEING NOT MORE THAN ONE TENTH OF THE PORE SIZE OF THE SPONGE STRUCTURE, PRESSING THE FINE PARTICLES INTO THE PORES BY THE APPLICATION OF PRESSURE INSUFFICIENT TO COMPLETELY CLOSE THE PORES OF THE METAL STRIP, AND HEATING THE PRESSED STRIP TO A TEMPERATURE OF 327* C. TO 450*C. FOR A PERIOD SUFFICIENT TO FUSE TOGETHER THE PARTICLES OF POLYTETRAFLUOROETHYLENE SO AS TO FORM A CON-
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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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |