US2343387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer unit
Assignee: DJ Murray Manufacturing Co
•
Filing: 1942-06-29
•
Granted: 1944-03-07
•
Expires: 1962-06-29
Abstract
No abstract record available.
Inventors
- 👤 John W Sargent
- 👤 Carl E Staky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:56
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0246; Y; Y10; Y10S; Y10S165/00; Y10S165/327; Y10S165/331
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) | 1947-03-07 | 1947-09-06 | 1948-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-07 | 1951-09-06 | 1952-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-07 | 1955-09-06 | 1956-03-07 | $7700.00 | Window Closed / Lapsed |