Patent US3235901A successfully refreshed from Google Patents.
US3235901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Caster
Assignee: Individual
•
Filing: 1962-10-02
•
Granted: 1966-02-22
•
Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 Albert E Rice
- 👤 Ford A Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:07
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/0047; B60B33/0052
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
IN A CASTER HAVING A FIRST PORTION AND A SECOND PORTION ASSEMBLED TOGETHER AND HAVING SUBSTANTIALLY SPHERICAL OUTER SURFACES, THE FIRST PORTION BEING A ROTATABLE TREAD BEARING ELEMENT INCLINED AT AN ACUTE ANGLE TO THE VERTICAL AND CONCENTRIC TO AN INCLINED AXIS OF THE SECOND PORTION, SAID AXIS OF THE SECOND PORTION BEING DISPOSED DOWNWARDLY FROM THE NORMAL AXIS OF THE SECOND NAMED PORTION SO THAT THE TREADS SURFACES OF THE FIRST NAMED PORTION IS LEVEL WITH THE TOP SURFACE OF THE SECOND PORTION AND EXTENDED BELOW THE BOTTOM PORTION OF THE SECOND NAMED ELEMENT TO IMPROVE THE ROLLING ACTION OF THE CASTER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |