US1962909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Griscom Russell Co
•
Filing: 1932-04-29
•
Granted: 1934-06-12
•
Expires: 1952-04-29
Abstract
No abstract record available.
Inventors
- 👤 Price Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:49
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/007; F28F9/013; F28D; F28D7/00; F28D7/005; F28D7/16; F28D7/163; F28D7/1653; F28D7/1661; F28F2265/00; F28F2265/26
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) | 1937-06-11 | 1937-12-11 | 1938-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-06-11 | 1941-12-11 | 1942-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-06-11 | 1945-12-11 | 1946-06-12 | $7700.00 | Window Closed / Lapsed |