US2797700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced flow valve
Assignee: Camco Inc
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Filing: 1953-08-07
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Granted: 1957-07-02
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Expires: 1973-08-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Harold E Mcgowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:50
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122; E21B43/123; F; F16; F16K; F16K41/00; F16K41/10; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2934; Y10T137/7722; Y10T137/7781
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |