US2436815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure operated valve
Assignee: General Electric Co
•
Filing: 1944-03-15
•
Granted: 1948-03-02
•
Expires: 1964-03-15
Abstract
No abstract record available.
Inventors
- 👤 Walter O Lum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:01
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/263; F02M; F02M61/00; F02M61/04; F02M61/10; F02M2700/00; F02M2700/07; F02M2700/074; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2612; Y10T137/2615; Y10T137/2617; Y10T137/7722; Y10T137/7781; Y10T137/7835
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-02 | 1951-09-01 | 1952-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-02 | 1955-09-01 | 1956-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-02 | 1959-09-01 | 1960-03-02 | $7700.00 | Window Closed / Lapsed |