Patent US4620305A successfully refreshed from Google Patents.
Patent US2578050A successfully refreshed from Google Patents.
US2578050A
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Automatic air volume control for liquid supply systems
Assignee: Red Jacket Manufacturing Co
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Filing: 1946-05-06
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Granted: 1951-12-11
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Expires: 1966-05-06
Abstract
No abstract record available.
Inventors
- 👤 Elmer M Deters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:09
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/16; F04B; F04B11/00; F04B11/0008; F04B11/0016; F04B11/0025; F04B31/00; F04B45/00; F04B45/04; F04B45/053; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/3137; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929
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) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |