US2274391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating system and evaporator therefor
Assignee: Worthington Pump and Machinery Corp
•
Filing: 1940-12-06
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Granted: 1942-02-24
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Expires: 1960-12-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Zwickl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:23
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F25B41/00; F25B41/30; F25B41/31; F25B41/315; F25B2339/00; F25B2339/02; F25B2339/024; F25B2339/0242; Y; Y10; Y10S; Y10S62/00; Y10S62/21
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) | 1945-02-23 | 1945-08-25 | 1946-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-02-23 | 1949-08-25 | 1950-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-02-23 | 1953-08-25 | 1954-02-24 | $7700.00 | Window Closed / Lapsed |