US2660816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination bulldozer and shovel arrangement
Assignee: Individual
•
Filing: 1949-02-17
•
Granted: 1953-12-01
•
Expires: 1969-02-17
Abstract
No abstract record available.
Inventors
- 👤 Willard A Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:42
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/08; E02F9/10; E02F9/12; E02F9/121; E02F9/123; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/308; E02F3/96; E02F3/961
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2233237A
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US2404926A
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US2462926A
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US2387656A
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US2446220A
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US2387764A
Cited
US2502681A
Cited
US2445614A
Cited
US2451101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |