Patent US2646066A successfully refreshed from Google Patents.
US2646066A
Expired / Lapsed
US
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One-way valve, particularly for lubricating systems
Assignee: Alex Friedmann KG
•
Filing: 1947-07-29
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Granted: 1953-07-21
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Expires: 1967-07-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:41
CPC Classifications
F; F16; F16N; F16N23/00; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/6167; Y10T137/6171; Y10T137/6174; Y10T137/7722; Y10T137/7781; Y10T137/7832; Y10T137/8593; Y10T137/87917; Y10T137/88054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US583037A
Cited
DE322550C
Cited
US1707259A
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US1819672A
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US1960271A
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US1818392A
Cited
US2013860A
Cited
US2132028A
Cited
US2200830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |