Patent US2730822A successfully refreshed from Google Patents.
US2730822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power drawn scraper
Assignee: Individual
•
Filing: 1951-11-02
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Granted: 1956-01-17
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Expires: 1971-11-02
Abstract
No abstract record available.
Inventors
- 👤 Laurel B Lindbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:27
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/6454; E02F3/6463
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2581073A
Cited
US2088091A
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US2147077A
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US2219478A
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US2227433A
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US2271631A
Cited
US2545235A
Cited
US2648920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |