US2648920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carry-type scraper and digging front apron arrangement
Assignee: Koehring Co
•
Filing: 1947-04-04
•
Granted: 1953-08-18
•
Expires: 1967-04-04
Abstract
No abstract record available.
Inventors
- 👤 Walter R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:01
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34; E02F3/352
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2224438A
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US2323428A
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US2312311A
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US2360823A
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US2363071A
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US2420319A
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US2396287A
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US2411280A
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US2490310A
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US2406300A
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US2505202A
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US2528550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |