US2417494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve end seal
Assignee: HOOF PRODUCTS Co
•
Filing: 1942-08-24
•
Granted: 1947-03-18
•
Expires: 1962-08-24
Abstract
No abstract record available.
Inventors
- 👤 Frances A Hoof
- 👤 Hugh C Kepner
- 👤 Eckert Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:51
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/46; Y; Y10; Y10S; Y10S251/00; Y10S251/90; Y10S277/00; Y10S277/91; Y10S285/00; Y10S285/906; Y10S285/918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US874652A
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US1686310A
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US1791449A
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CH177010A
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US2115383A
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US2107200A
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US2263750A
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US2353161A
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US2307828A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-17 | 1950-09-16 | 1951-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-17 | 1954-09-16 | 1955-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-17 | 1958-09-16 | 1959-03-18 | $7700.00 | Window Closed / Lapsed |