US2457334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitors in refrigeration system
Assignee: Electrolux AB
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Filing: 1944-09-29
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Granted: 1948-12-28
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Expires: 1964-09-29
Abstract
No abstract record available.
Inventors
- 👤 Widell Nils Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:21
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/047; C23; C23F; C23F11/00; C23F11/06; F; F25; F25B; F25B47/00; F25B47/003
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) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |