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Patent US2606572A successfully refreshed from Google Patents.
US2606572A
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US
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Liquid level control
Assignee: Harris Trust and Savings Bank Corp
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Filing: 1949-02-10
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Granted: 1952-08-12
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Expires: 1969-02-10
Abstract
No abstract record available.
Inventors
- 👤 Arnold Charles Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:24
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374; Y10T137/7413; Y10T137/742
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US848739A
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US894734A
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US1160441A
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US1302538A
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US1878947A
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US1980430A
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US2136707A
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US2491521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |