US2495227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condition responsive reversing valve mechanism
Assignee: General Electric Co
•
Filing: 1947-02-19
•
Granted: 1950-01-24
•
Expires: 1967-02-19
Abstract
No abstract record available.
Inventors
- 👤 Walter O Lum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:10
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/125; G05D23/126; G05D23/127; G05D23/128; G05D23/121; G05D23/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2285513A
Cited
US2310293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |