US2309032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitary fluid control valve and method of operation
Assignee: DURO CO
•
Filing: 1938-10-24
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Granted: 1943-01-19
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Expires: 1958-10-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:06
CPC Classifications
B; B01; B01F; B01F35/00; B01F35/71; B01F35/717; B01F35/71805; B01F35/712; C; C02; C02F; C02F1/00; C02F1/42; F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87249
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) | 1946-01-18 | 1946-07-20 | 1947-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-01-18 | 1950-07-20 | 1951-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-01-18 | 1954-07-20 | 1955-01-19 | $7700.00 | Window Closed / Lapsed |