US2154777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow responsive mechanism
Assignee: Individual
•
Filing: 1937-01-04
•
Granted: 1939-04-18
•
Expires: 1957-01-04
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Schlalos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:16
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/08; F23N1/087; Y; Y10; Y10T; Y10T137/00; Y10T137/4673; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/18936
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) | 1942-04-17 | 1942-10-17 | 1943-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-17 | 1946-10-17 | 1947-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-17 | 1950-10-17 | 1951-04-18 | $7700.00 | Window Closed / Lapsed |