Patent US3055042A successfully refreshed from Google Patents.
US3055042A
Expired / Lapsed
US
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Caster mechanism and locks therefor
Assignee: Ritter Co Inc
•
Filing: 1958-12-03
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Granted: 1962-09-25
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Expires: 1978-12-03
Abstract
No abstract record available.
Inventors
- 👤 Karl H Burzlaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:31
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/0078; B60B33/0089; A; A61; A61G; A61G13/00; A61G13/10; A61G7/00; A61G7/05; A61G7/0528; B60B33/02; A61G13/104; B60B2200/00; B60B2200/20; B60B2200/24; B60B2200/242
Claims Analysis
Total Claims: 0
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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) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |