US2383292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange device
Assignee: Cherry Burrell Corp
•
Filing: 1938-11-30
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Granted: 1945-08-21
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Expires: 1958-11-30
Abstract
No abstract record available.
Inventors
- 👤 Dalzell Charles Brown
- 👤 Wyman Ellsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:35
CPC Classifications
A; A01; A01J; A01J9/00; A01J9/04; F; F28; F28F; F28F3/00; F28F3/12
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) | 1948-08-20 | 1949-02-19 | 1949-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-08-20 | 1953-02-19 | 1953-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-08-20 | 1957-02-19 | 1957-08-21 | $7700.00 | Window Closed / Lapsed |