Patent US2806486A successfully refreshed from Google Patents.
US2806486A
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Automatic control for manifold valve with selective by-pass rotor
Assignee: U S FLEXIBLE METALLIC TUBING C
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Filing: 1953-12-22
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Granted: 1957-09-17
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Expires: 1973-12-22
Abstract
No abstract record available.
Inventors
- 👤 Frank A Mcdonald
- 👤 Leon H Sandefur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:19
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/041; F16K31/043; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86493; Y10T137/86501; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19874
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1432494A
Cited
US1748390A
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US1910004A
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US1811624A
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US2229993A
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US2327046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |