Patent US2810394A successfully refreshed from Google Patents.
US2810394A
Expired / Lapsed
US
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Valve construction
Assignee: Individual
•
Filing: 1955-04-08
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Granted: 1957-10-22
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Expires: 1975-04-08
Abstract
No abstract record available.
Inventors
- 👤 Ferguson Robert Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:26
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/08; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4259; Y10T137/8158; Y10T137/8225; Y10T137/8275
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US497903A
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US1372645A
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US1071600A
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US1042982A
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US1692302A
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US1924125A
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US1788763A
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US1986600A
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US2349727A
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US2584083A
Cited
US2512744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |