Patent US2297370A successfully refreshed from Google Patents.
US2297370A
Expired / Lapsed
US
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Refrigeration
Assignee: Hoover Co
•
Filing: 1938-07-20
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Granted: 1942-09-29
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Expires: 1958-07-20
Abstract
No abstract record available.
Inventors
- 👤 Arnold D Siedle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:15
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/04; F25D; F25D21/00; F25D21/02; F25B2700/00; F25B2700/11; F25B2700/111; F25D11/00; F25D11/02; F25D11/027; F25D2400/00; F25D2400/30; F25D2700/00; F25D2700/02
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) | 1945-09-28 | 1946-03-30 | 1946-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-09-28 | 1950-03-30 | 1950-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-09-28 | 1954-03-30 | 1954-09-29 | $7700.00 | Window Closed / Lapsed |