Patent US903341A successfully refreshed from Google Patents.
US2807367A
Expired / Lapsed
US
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Vertical axis gyratory screen
Assignee: Nordberg Manufacturing Co
•
Filing: 1952-06-06
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Granted: 1957-09-24
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Expires: 1972-06-06
Abstract
No abstract record available.
Inventors
- 👤 Loren G Symons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:40
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/38; B07B2201/00; B07B2201/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US463162A
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CH36841A
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US964183A
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US2134876A
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GB432848A
Cited
US2198148A
Cited
US2367070A
Cited
US2500965A
Cited
GB595580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |