US2909907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating apparatus with hot gas defrost means
Assignee: Whirlpool Corp
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Filing: 1958-11-25
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Granted: 1959-10-27
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Expires: 1978-11-25
Abstract
No abstract record available.
Inventors
- 👤 Donald F Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:50
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022; F25D; F25D11/00; F25D11/02; F25D11/022; F25D2317/00; F25D2317/06; F25D2317/066; F25D2317/0665; F25D2317/068; F25D2317/0683; F25D2400/00; F25D2400/10; F25D2400/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |