Patent US2758602A successfully refreshed from Google Patents.
Patent US2994504A successfully refreshed from Google Patents.
US2994504A
Expired / Lapsed
US
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Plug valve
Assignee: Continental Manufacturing Co
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Filing: 1958-09-04
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Granted: 1961-08-01
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Expires: 1978-09-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles L Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:24
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/02; F16K5/0257; F16K5/0271; F16K27/00; F16K27/06; F16K27/062; F16K5/0264; F16K5/04; F16K5/0457; F16K5/0471
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US461084A
Cited
US477606A
Cited
CA475316A
Cited
GB275427A
Cited
US2728550A
Cited
US2813695A
Cited
US2913219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |