Patent US2977809A successfully refreshed from Google Patents.
US2977809A
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US
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Variable actuator for screens, feeders and the like
Assignee: Nordberg Manufacturing Co
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Filing: 1957-10-16
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Granted: 1961-04-04
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Expires: 1977-10-16
Abstract
No abstract record available.
Inventors
- 👤 George D Becker
- 👤 Keith B Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:19
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/10; B06B1/16; B06B1/161; B06B1/166; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18344; Y10T74/18544; Y10T74/18552
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |