US2807509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed bearing structure
Assignee: NORMA HOFFMAN BEARINGS CORP
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Filing: 1956-06-25
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Granted: 1957-09-24
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Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Warren D Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:24
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/58; F16C33/60; F16C33/605; F16C33/583; F16C33/72; F16C33/76; F16C33/767; F16C33/78; F16C33/7889; F16C19/00; F16C19/22; F16C19/24; F16C19/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR812175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |