US2362985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Brown Fintube Co
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Filing: 1941-12-24
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Granted: 1944-11-21
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Expires: 1961-12-24
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:16
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/10; F28D7/103; F28D7/106; F28F; F28F13/00; F28F13/06; F28F9/00; F28F9/007; F28F9/013; F28F9/02; F28F9/0219; F28F2280/00; F28F2280/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
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) | 1947-11-21 | 1948-05-22 | 1948-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-11-21 | 1952-05-22 | 1952-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-11-21 | 1956-05-22 | 1956-11-21 | $7700.00 | Window Closed / Lapsed |