US3394808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating granular materials
Assignee: Individual
•
Filing: 1966-01-03
•
Granted: 1968-07-30
•
Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Andy L Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:51
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE23429C
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US1007119A
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US1674142A
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US1843404A
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US2269046A
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US2249109A
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US2601924A
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US2706046A
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US3089592A
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US3249220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |