Patent US2652940A successfully refreshed from Google Patents.
US2652940A
Expired / Lapsed
US
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Excavating dipper
Assignee: NORTHWEST ENGINEERING Corp
•
Filing: 1950-08-24
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Granted: 1953-09-22
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Expires: 1970-08-24
Abstract
No abstract record available.
Inventors
- 👤 Anders H Brolin
- 👤 Harvey A W Kamholtz
- 👤 Bernard E Blanchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:16
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/38; E02F3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US809436A
Cited
US1350245A
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US1735716A
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US1816291A
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US1944374A
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US2025090A
Cited
US2154679A
Cited
US2185176A
Cited
US2462790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |