US2393854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed control for liquid refrigerant
Assignee: Individual
•
Filing: 1942-01-31
•
Granted: 1946-01-29
•
Expires: 1962-01-31
Abstract
No abstract record available.
Inventors
- 👤 Elizabeth C Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:17
CPC Classifications
F; F25; F25B; F25B40/00; F25B41/00; F25B41/30; F25B41/37; F25B2400/00; F25B2400/05; F25B2400/052; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2829
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) | 1949-01-28 | 1949-07-30 | 1950-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-28 | 1953-07-30 | 1954-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-28 | 1957-07-30 | 1958-01-29 | $7700.00 | Window Closed / Lapsed |