Patent US3012392A successfully refreshed from Google Patents.
US3012392A
Expired / Lapsed
US
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Rake cleaning device
Assignee: Individual
•
Filing: 1959-09-14
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Granted: 1961-12-12
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Expires: 1979-09-14
Abstract
No abstract record available.
Inventors
- 👤 John F Walters
- 👤 Frederick A Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:56
CPC Classifications
A; A01; A01D; A01D7/00; A01D7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US667428A
Cited
US1981488A
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US2183278A
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US2471239A
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US2572247A
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US2544436A
Cited
US2539590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |