US2227405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural valve control
Assignee: Reliance Gauge Column Co
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Filing: 1938-09-30
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Granted: 1940-12-31
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Expires: 1958-09-30
Abstract
No abstract record available.
Inventors
- 👤 Brown John Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:19
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/42; F22B37/425; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; G; G01; G01F; G01F23/00; G01F23/30; G01F23/32; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2511; Y10T137/7287; Y10T137/7358; Y10T137/7365; Y10T137/7368; Y10T137/7371; Y10T137/7374; Y10T137/8158; Y10T137/8342
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-12-31 | 1944-07-01 | 1944-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-31 | 1948-07-01 | 1948-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-31 | 1952-07-01 | 1952-12-31 | $7700.00 | Window Closed / Lapsed |