US2472788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step-up gearing
Assignee: Doosan Bobcat North America Inc
•
Filing: 1945-05-25
•
Granted: 1949-06-14
•
Expires: 1965-05-25
Abstract
No abstract record available.
Inventors
- 👤 Robert E Burrus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:14
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US443259A
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US1432195A
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US1217427A
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US1470947A
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US1645371A
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US1639680A
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FR660902A
Cited
US2194823A
Cited
US2230604A
Cited
US2214485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |