US2596787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve
Assignee: United States Steel Corp
•
Filing: 1945-11-02
•
Granted: 1952-05-13
•
Expires: 1965-11-02
Abstract
No abstract record available.
Inventors
- 👤 Ottinger Harry
- 👤 Edward B Trayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:06
CPC Classifications
C; C21; C21B; C21B9/00; C21B9/10; C21B9/12; F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/6167; Y10T137/6171; Y10T137/6174
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1635287A
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US630315A
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US1402824A
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US1443000A
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GB253983A
Cited
US1682075A
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US1661190A
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US1860619A
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US1935197A
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US2114168A
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US2271390A
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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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |