US2564529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot valve
Assignee: Individual
•
Filing: 1945-05-21
•
Granted: 1951-08-14
•
Expires: 1965-05-21
Abstract
No abstract record available.
Inventors
- 👤 Donald G Griswold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:04
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074; F16K11/0743; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1841453A
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US1121140A
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US1976417A
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US1829022A
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US2042186A
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US2031309A
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US2193720A
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US2233192A
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US2399301A
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US2251481A
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US2361655A
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US2344714A
Cited
US2344913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |