Patent US3729347A successfully refreshed from Google Patents.
US3729347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-strength,centrifugally cast copper-base alloy bearing cage
Assignee: Janney Cylinder Co
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Filing: 1970-12-11
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Granted: 1973-04-24
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Expires: 1990-12-11
Abstract
Abstract ALLOYS CONSISTING ESSENTIALLY OF FROM ABOUT 26.0 TO ABOUT 34.0% ZINC, FROM ABOUT 4.5 TO ABOUT 10.0% (PREFERABLY FROM ABOUT 4.5 TO ABOUT 6.0%) MANGANESE, FROM ABOUT .0.5 TO ABOUT 1.5% IRON, FROM ABOUT 1.0 TO ABOUT 2.5 ALUMINUM, AND THE BALANCE COOPPR. LEAD CAN BE OPTIONALLY ADDED, IN AMOUNT OF FROM ABOUT 0.5 TO ABOUT 1.5%. THE ALLOYS HAVE IMPROVED PHYSICAL PROPERTIES, PARTICULARLY AT ELEVATED TEMPERATURES, AND CAN BE CENTRIFUGALLY CAST FOR MANUFACTURE INA NTIFRICTION BEARING CAGES.
Inventors
- 👤 W Brown
- 👤 T Robertshaw
- 👤 G Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:17
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/38; F16C33/44; C; C22; C22C; C22C9/00; C22C9/04; F16C33/3837; F16C33/3843; F16C33/385; F16C2204/00; F16C2204/10; F16C2204/14; F16C2220/00; F16C2220/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12361
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |