US2441833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant evaporator
Assignee: Individual
•
Filing: 1943-08-16
•
Granted: 1948-05-18
•
Expires: 1963-08-16
Abstract
No abstract record available.
Inventors
- 👤 Willard L Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:36
CPC Classifications
F; F25; F25D; F25D31/00; F25D31/006; F25B; F25B39/00; F25B39/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US733191A
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FR463265A
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US1542993A
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US1709865A
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US1868837A
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US1985381A
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US2055994A
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US2121579A
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US2183509A
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US2332349A
Cited
US2356779A
Cited
US2349695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |