US2476519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-way valve
Assignee: Adel Precision Products Corp
•
Filing: 1944-12-04
•
Granted: 1949-07-19
•
Expires: 1964-12-04
Abstract
No abstract record available.
Inventors
- 👤 Werff Jacob B Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:12
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0603; F16K31/061; F16K31/0613; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87048; Y10T137/87169; Y10T137/87217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US665704A
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US817773A
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US993742A
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US1157196A
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US1486303A
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US1772920A
Cited
US1956775A
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US2339353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |