Patent US2445255A successfully refreshed from Google Patents.
US2445255A
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Regulating mechanism responsive to variations in density and temperature of liquids
Assignee: Brown Instruments Co
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Filing: 1942-07-04
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Granted: 1948-07-13
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Expires: 1962-07-04
Abstract
No abstract record available.
Inventors
- 👤 Gavin S Younkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:12
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4216; G; G01; G01N; G01N9/00; G01N9/10; G01N9/12; G01N9/18; G05; G05D; G05D23/00; G05D23/01; G05D23/015; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2452; Y10T137/2496; Y10T137/2499; Y10T137/2504
Claims Analysis
Total Claims: 0
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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) | 1951-07-13 | 1952-01-12 | 1952-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-13 | 1956-01-12 | 1956-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-13 | 1960-01-12 | 1960-07-13 | $7700.00 | Window Closed / Lapsed |