US1845256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange device
Assignee: Cherry Burrell Corp
•
Filing: 1930-03-14
•
Granted: 1932-02-16
•
Expires: 1950-03-14
Abstract
No abstract record available.
Inventors
- 👤 Feldmeier Harvey
- 👤 Astle William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:58
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/26; A; A01; A01J; A01J9/00; A01J9/04; F28D; F28D7/00; F28D7/10; F28D7/106
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) | 1935-02-15 | 1935-08-17 | 1936-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-02-15 | 1939-08-17 | 1940-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-02-15 | 1943-08-17 | 1944-02-16 | $7700.00 | Window Closed / Lapsed |