US2467219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage refrigerating apparatus
Assignee: Individual
•
Filing: 1942-12-21
•
Granted: 1949-04-12
•
Expires: 1962-12-21
Abstract
No abstract record available.
Inventors
- 👤 Willard L Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:45
CPC Classifications
F; F25; F25D; F25D31/00; F25D31/006; F25B; F25B31/00; F25B31/002; F25B43/00; F25B43/02; F25B7/00; F25B2341/00; F25B2341/001; F25B2341/0014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1808494A
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US1893171A
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US1904590A
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US1985381A
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US2082189A
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US2128020A
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US2195220A
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US2239709A
Cited
US2291565A
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US2316016A
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US2356779A
Cited
US2352581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-11 | 1952-10-11 | 1953-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-11 | 1956-10-11 | 1957-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-11 | 1960-10-11 | 1961-04-12 | $7700.00 | Window Closed / Lapsed |