US2850852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooled pulley for abrasive belt grinders
Assignee: Individual
•
Filing: 1957-05-31
•
Granted: 1958-09-09
•
Expires: 1977-05-31
Abstract
No abstract record available.
Inventors
- 👤 Fred C Hofberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:21
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/36; B; B24; B24B; B24B21/00; B24B21/04; B24B21/12; B24B21/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US137465A
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US566638A
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US698126A
Cited
US1400671A
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US1385396A
Cited
US1512546A
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US2530960A
Cited
US2594647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |