US2291131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control for driers and other heat exchange elements
Assignee: ARNSTRONG MACHINE WORKS
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Filing: 1940-08-19
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Granted: 1942-07-28
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Expires: 1960-08-19
Abstract
No abstract record available.
Inventors
- 👤 Adam E Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:22
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/14; F26B13/18; F26B13/183; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/6416; Y10T137/8593; Y10T137/86268; Y10T137/86493
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) | 1945-07-27 | 1946-01-26 | 1946-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-27 | 1950-01-26 | 1950-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-27 | 1954-01-26 | 1954-07-28 | $7700.00 | Window Closed / Lapsed |