Patent US2420592A successfully refreshed from Google Patents.
US2420592A
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Balancing means for centrifugal machines
Assignee: ELECTRIC HOUSEHOLD UTILITIES
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Filing: 1944-06-30
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Granted: 1947-05-13
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Expires: 1964-06-30
Abstract
No abstract record available.
Inventors
- 👤 Andrew H Gerhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
B; B04; B04B; B04B9/00; B04B9/14; D; D06; D06F; D06F37/00; D06F37/20; D06F37/24; D06F37/245; F; F16; F16F; F16F15/00; F16F15/32; F16F15/36; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/211; Y10T74/2114
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |