US2734024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making bearings
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:32
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/10; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49647; Y10T29/49668; Y10T29/49677; Y10T29/49705; Y10T29/49709
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A METHOD FOR MAKING BEARINGS COMPRISING A BEARING MEMBER INCLUDING ALUMINUM AS ITS MAJOR CONSTITUENT AND HAVING AN OVERLAY OF A LEAD-BASE ALLOY, THE STEPS COMPRISING: CHEMICALLY ETCHING A SURFACE OF SAID BEARING MEMBER IN A CAUSTIC SOLUTION FOR CLEANING THE SAME, SUPERIMPOSING AN ACIDIC ETCH UPON SAID CLEANED AND ETCHED SURFACE, PLATING SAID DOUBLY ETCHED SURFACE WITH SUCCESSIVE LAYERS OF ZINC AND THEN COOPER WHEREIN THE COPPER LAYER IS NOT LESS THAN .00001" AND NOT EXCESS OF .00005" THICK, AND FINALLY COPLATING THIS LAYER OF BEARING ALLOY ONTO THE SURFACE OF SAID COPPER LAYER, SAID BEARING ALLOY CONSISTING OF A LEAD-BASE ALLOY HAVING LEAD IN QUANTITIES OF AT LEAST 82% THEREOF AND BEING IN A THICKNESS NOT IN EXCESS OF .001.
Claim 2
Dependent Claim
123 words
IN A METHOD FOR MAKING BEARINGS COMPRISING A BEARING MEMBER INCLUDING ALUMINUM AS ITS MAJOR CONSTITUENT AND HAVING AN OVERLAY OF A LEAD-BASE ALLOY, THE STEPS COMPRISING: CHEMICALLY ETCHING A SURFACE OF SAID BEARING MEMBER IN A CAUSTIC SOLUTION FOR CLEANING THE SAME, SUPERIMPOSING AN ACIDIC ETCH UPON SAID CLEANED AND ETCHED SURFACE, PLATING SAID DOUBLY ETCHED SURFACE WITH SUCCESSIVE LAYERS OF ZINC AND THEN COOPER WHEREIN THE COPPER LAYER IS NOT LESS THAN .00001" AND NOT EXCESS OF .00005" THICK, AND FINALLY COPLATING THIS LAYER OF BEARING ALLOY ONTO THE SURFACE OF SAID COPPER LAYER, SAID BEARING ALLOY CONSISTING OF A LEAD-BASE ALLOY HAVING LEAD IN QUANTITIES OF AT LEAST 82% THEREOF AND BEING IN A THICKNESS NOT IN EXCESS OF .001.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |