Patent US644608A successfully refreshed from Google Patents.
US644608A
Expired / Lapsed
US
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Ball-bearing.
Assignee: KELLER TOOL CO
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Filing: 1899-02-07
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Granted: 1900-03-06
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Expires: 1919-02-07
Abstract
No abstract record available.
Inventors
- 👤 Julius Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:56
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/02; F16C19/04; F16C19/08; F16C33/00; F16C33/30; F16C33/38; F16C33/42; F16C33/422; F16C33/425; F16C33/58; F16C33/60; F16C19/06; F16C19/54
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) | 1903-03-06 | 1903-09-05 | 1904-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-03-06 | 1907-09-05 | 1908-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-03-06 | 1911-09-05 | 1912-03-06 | $7700.00 | Window Closed / Lapsed |