Patent US3218989A successfully refreshed from Google Patents.
US3218989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bolster bearing
Assignee: Midland Ross Corp
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Filing: 1962-06-27
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Granted: 1965-11-23
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Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Kreiner
- 👤 Hans B Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:51
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/16; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A CAR TRUCK BOLSTER HAVING A KING PIN OPENING CONCENTRIC TO A NORMALLY VERTICAL AXIS, AND NORMALLY HORIZONTAL LONGITUDINAL AND TRANSVERSE AXES IN RIGHT ANGLE RELATIONSHIP, SAID BOLSTER COMPRISING: (A) AN ANNULAR FLANGE CONCENTRIC TO SAID PIN-OPENING AXIS GENERALLY DEFINING THE PERIMETER OF A CENTER PLATE RECEIVING RECESS; AN ANNULAR FLOOR DEFINING THE BOTTOM OF SAID RECESS; (B) METALLIC WEAR BAND HAVING A GAP IN ITS CIRCUMFERENCE NORMALLY POSITIONED ALONG THE INNER CIRCUMFERENCE OF THE FLANGE, SAID BAND HAVING AN UPWARDLY
Claim 2
Dependent Claim
81 words
A CAR TRUCK BOLSTER HAVING A KING PIN OPENING CONCENTRIC TO A NORMALLY VERTICAL AXIS, AND NORMALLY HORIZONTAL LONGITUDINAL AND TRANSVERSE AXES IN RIGHT ANGLE RELATIONSHIP, SAID BOLSTER COMPRISING: (A) AN ANNULAR FLANGE CONCENTRIC TO SAID PIN-OPENING AXIS GENERALLY DEFINING THE PERIMETER OF A CENTER PLATE RECEIVING RECESS; AN ANNULAR FLOOR DEFINING THE BOTTOM OF SAID RECESS; (B) METALLIC WEAR BAND HAVING A GAP IN ITS CIRCUMFERENCE NORMALLY POSITIONED ALONG THE INNER CIRCUMFERENCE OF THE FLANGE, SAID BAND HAVING AN UPWARDLY
References Cited (Backward Citations)
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |