US3557401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Castors
Assignee: Individual
•
Filing: 1968-02-26
•
Granted: 1971-01-26
•
Expires: 1988-02-26
Abstract
Abstract THE INVENTION PROVIDES AN IMPROVED CASTOR OF THE TYPE HAVING A PLURALITY OF SMALL BALLS DISPOSED IN A SPACE FOR DUAL ROLLING CONTACT BETWEEN A LOAD SUPPORTING LARGE BALL AND A HOUSING SKIRTING AND RETAINING THE LARGE BALL AND THE HOUSING IS CONSTRUCTED TO ALLOW FREE MOVEMENT OF THE SMALL BALLS IN THE SPACE WHEREBY CLUSTERING AND RESULTANT JAMMING OF THE SMALL BALLS IS PREVENTED.
Inventors
- 👤 Albert William Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:15
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/08; F; F16; F16C; F16C29/00; F16C29/04; F16C29/045; F16C29/046; F16C2326/00; F16C2326/01; F16C2326/02; F16C29/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |