US3021626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scraper blade
Assignee: Esco Corp
•
Filing: 1958-01-21
•
Granted: 1962-02-20
•
Expires: 1978-01-21
Abstract
No abstract record available.
Inventors
- 👤 Eyolfson Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:07
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8152
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US7252A
Cited
US1419524A
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US1503866A
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US1633057A
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US1674110A
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US1712853A
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US1765218A
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US1807998A
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US1976303A
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US1989776A
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US2471164A
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US2452387A
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US2683942A
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US2494225A
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US2887797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |