US2041328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Alco Products Inc
•
Filing: 1935-08-12
•
Granted: 1936-05-19
•
Expires: 1955-08-12
Abstract
No abstract record available.
Inventors
- 👤 James B Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:34
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/26
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) | 1939-05-19 | 1939-11-18 | 1940-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-19 | 1943-11-18 | 1944-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-19 | 1947-11-18 | 1948-05-19 | $7700.00 | Window Closed / Lapsed |