US3490584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for high frequency screening of materials
Assignee: Cavitron Corp
•
Filing: 1965-08-31
•
Granted: 1970-01-20
•
Expires: 1985-08-31
Abstract
No abstract record available.
Inventors
- 👤 Lewis Balamuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:58
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/34; B07B2230/00; B07B2230/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US210521A
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DE956905C
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FR1078444A
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US2880871A
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US3076547A
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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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |