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Patent US2416401A successfully refreshed from Google Patents.
US2416401A
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Subgrading machine
Assignee: Blaw Knox Co
•
Filing: 1944-03-17
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Granted: 1947-02-25
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Expires: 1964-03-17
Abstract
No abstract record available.
Inventors
- 👤 Meisenburg Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:08
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34; E02F3/348; E02F3/3483
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1705291A
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US1653333A
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US1841799A
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US1995629A
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US2072150A
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US2200724A
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US2131373A
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GB519046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-24 | 1950-08-26 | 1951-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-24 | 1954-08-26 | 1955-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-24 | 1958-08-26 | 1959-02-25 | $7700.00 | Window Closed / Lapsed |