US3007147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm for drum-type feeder
Assignee: Riley Power Inc
•
Filing: 1957-08-23
•
Granted: 1961-10-31
•
Expires: 1977-08-23
Abstract
No abstract record available.
Inventors
- 👤 Oscar A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:21
CPC Classifications
F; F23; F23K; F23K3/00; F23K2203/00; F23K2203/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1873353A
Cited
DE414117C
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US1680024A
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DE497881C
Cited
US2303226A
Cited
US2308146A
Cited
US2376079A
Cited
US2550616A
Cited
US2914781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |