Patent US2494465A successfully refreshed from Google Patents.
US2494465A
Expired / Lapsed
US
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Apparatus for classifying particles
Assignee: Aerotec Corp
•
Filing: 1945-05-23
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Granted: 1950-01-10
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Expires: 1965-05-23
Abstract
No abstract record available.
Inventors
- 👤 John E Watson
- 👤 Charles B Mcbride
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:58
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/08; B07B7/086; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2360355A
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US2389701A
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US2354311A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |