US2061250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination distillation and liquation furnace
Assignee: American Smelting and Refining Co
•
Filing: 1932-08-05
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Granted: 1936-11-17
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Expires: 1952-08-05
Abstract
No abstract record available.
Inventors
- 👤 Melville F Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:02
CPC Classifications
C; C22; C22B; C22B19/00; C22B19/32; C22B9/00; C22B9/02; F; F27; F27B; F27B17/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S266/00; Y10S266/90
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) | 1939-11-17 | 1940-05-18 | 1940-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-11-17 | 1944-05-18 | 1944-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-11-17 | 1948-05-18 | 1948-11-17 | $7700.00 | Window Closed / Lapsed |