US2791990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic mixing method and apparatus therefor
Assignee: Individual
•
Filing: 1954-05-21
•
Granted: 1957-05-14
•
Expires: 1974-05-21
Abstract
No abstract record available.
Inventors
- 👤 Daniel A Grieb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:05
CPC Classifications
F; F02; F02M; F02M27/00; F02M27/08; Y; Y10; Y10S; Y10S261/00; Y10S261/48
Claims Analysis
Total Claims: 0
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US2587304A
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US2565159A
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US2632634A
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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) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |