US2218944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1937-11-05
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Granted: 1940-10-22
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Expires: 1957-11-05
Abstract
No abstract record available.
Inventors
- 👤 Edward R Wolfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:26
CPC Classifications
A; A22; A22B; A22B5/00; A22B5/06; A22C; A22C17/00; A22C17/02; F; F25; F25B; F25B49/00; F25B49/02; F25B49/025; F25B2700/00; F25B2700/19; F25B2700/193; F25B2700/1931; F25B2700/1933; F25B2700/21; F25B2700/2104; F25B2700/2117
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) | 1943-10-22 | 1944-04-22 | 1944-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-22 | 1948-04-22 | 1948-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-22 | 1952-04-22 | 1952-10-22 | $7700.00 | Window Closed / Lapsed |