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Patent US2990072A successfully refreshed from Google Patents.
US2990072A
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Material handling mechanism
Assignee: Doosan Bobcat North America Inc
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Filing: 1956-06-08
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Granted: 1961-06-27
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Expires: 1976-06-08
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Mindrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:45
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/065; B66F9/0655; E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34; E02F3/3402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2408003A
Cited
US2527452A
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US2510525A
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US2631744A
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US2606078A
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US2613822A
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US2753060A
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US2701657A
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US2860793A
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US2731162A
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US2811265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |