US2254833A
Expired / Lapsed
US
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Method and apparatus for controlling intermittent fluid flow
Assignee: John Wyeth and Brother Ltd
•
Filing: 1940-06-27
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Granted: 1941-09-02
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Expires: 1960-06-27
Abstract
No abstract record available.
Inventors
- 👤 David M Ashkenaz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:49
CPC Classifications
A; A61; A61J; A61J15/00; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/172; A61J15/0026; A61J15/0092; A61M2206/00; A61M2206/10; A61M2206/22; Y; Y10; Y10S; Y10S128/00; Y10S128/13; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86421
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) | 1944-09-01 | 1945-03-03 | 1945-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-01 | 1949-03-03 | 1949-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-01 | 1953-03-03 | 1953-09-02 | $7700.00 | Window Closed / Lapsed |