Patent US2372449A successfully refreshed from Google Patents.
US2372449A
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Co-ordinated control of cyclical operations on fluid and like materials
Assignee: PORTEOUS
•
Filing: 1941-07-25
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Granted: 1945-03-27
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Expires: 1961-07-25
Abstract
No abstract record available.
Inventors
- 👤 Porteous William King
- 👤 Marchment William Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:54
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/53; F16K31/54; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/2564; Y10T137/2567; Y10T137/265; Y10T137/2668; Y10T137/2688; Y10T137/4673; Y10T137/469; Y10T137/4857
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-03-26 | 1948-09-25 | 1949-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-03-26 | 1952-09-25 | 1953-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-03-26 | 1956-09-25 | 1957-03-27 | $7700.00 | Window Closed / Lapsed |