Patent US2938503A successfully refreshed from Google Patents.
US2938503A
Expired / Lapsed
US
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Hydraulic valve sleeve
Assignee: Bendix Aviation Corp
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Filing: 1950-02-15
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Granted: 1960-05-31
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Expires: 1970-02-15
Abstract
No abstract record available.
Inventors
- 👤 Howard H Laucks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:26
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0402; F15B13/044; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/87096; Y10T137/87113; Y10T137/87169; Y10T137/87217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US465232A
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US1219334A
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US1822667A
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US2018977A
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US2284413A
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US2304784A
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US2387896A
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US2412549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |