US2633390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling fan
Assignee: Ben Pearson Inc
•
Filing: 1950-08-12
•
Granted: 1953-03-31
•
Expires: 1970-08-12
Abstract
No abstract record available.
Inventors
- 👤 Bush Dale Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:07
CPC Classifications
A; A01; A01D; A01D87/00; A01D87/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US303375A
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US757267A
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US828592A
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US865962A
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US1086686A
Cited
US1342592A
Cited
US1843088A
Cited
US1871747A
Cited
US1983201A
Cited
US2370202A
Cited
US2445111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |