US2446910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controls and systems for defrosting cooling units of refrigerating machines
Assignee: Individual
•
Filing: 1944-02-18
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Granted: 1948-08-10
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Expires: 1964-02-18
Abstract
No abstract record available.
Inventors
- 👤 Lonnie A Dickens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:20
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022; F25B47/025; F25B41/00; F25B41/20; F25B41/26; Y; Y10; Y10T; Y10T137/00; Y10T137/1189; Y10T137/4238; Y10T137/4245; Y10T137/4252; Y10T137/6416; Y10T137/6579; Y10T137/7722; Y10T137/7737; Y10T137/8593; Y10T137/85954; Y10T137/87048; Y10T137/877; Y10T137/87708; Y10T137/87748; Y10T137/87756; Y10T137/87917
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) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |