US1830894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration
Assignee: Electrolux Servel Corp
•
Filing: 1929-03-05
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Granted: 1931-11-10
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Expires: 1949-03-05
Abstract
No abstract record available.
Inventors
- 👤 Ullstrand Hugo Malcolm
- 👤 Campbell Walter Raleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:50
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/10; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62; Y10; Y10S; Y10S137/00; Y10S137/903; Y10S251/00; Y10S251/903; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/6126; Y10T137/8593; Y10T137/87917; Y10T137/87925
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) | 1934-11-09 | 1935-05-11 | 1935-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-09 | 1939-05-11 | 1939-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-09 | 1943-05-11 | 1943-11-10 | $7700.00 | Window Closed / Lapsed |