Patent US1933580A successfully refreshed from Google Patents.
US1933580A
Expired / Lapsed
US
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Defrosting of mechanical refrigerators
Assignee: MITZI OTT
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Filing: 1932-03-10
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Granted: 1933-11-07
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Expires: 1952-03-10
Abstract
No abstract record available.
Inventors
- 👤 Lawrence E Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:34
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/002
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) | 1936-11-06 | 1937-05-08 | 1937-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-06 | 1941-05-08 | 1941-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-06 | 1945-05-08 | 1945-11-07 | $7700.00 | Window Closed / Lapsed |