US2561531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for controlling gaseous fuel
Assignee: Individual
•
Filing: 1948-02-18
•
Granted: 1951-07-24
•
Expires: 1968-02-18
Abstract
No abstract record available.
Inventors
- 👤 Ervin H Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:01
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/10; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87096; Y10T137/87121; Y10T137/87129; Y10T137/87137; Y10T137/87917; Y10T137/87981; Y10T137/87989
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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |