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Patent US2573238A successfully refreshed from Google Patents.
US2573238A
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Balanced plug valve
Assignee: Individual
•
Filing: 1946-03-19
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Granted: 1951-10-30
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Expires: 1966-03-19
Abstract
No abstract record available.
Inventors
- 👤 Richard H Wunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:49
CPC Classifications
F; F16; F16K; F16K39/00; F16K39/06; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4372; Y10T137/4442; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18232
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1400647A
Cited
US1403756A
Cited
GB256098A
Cited
US2065726A
Cited
US2321233A
Cited
US2368183A
Cited
US2433638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |