US2739795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Individual
•
Filing: 1954-04-19
•
Granted: 1956-03-27
•
Expires: 1974-04-19
Abstract
No abstract record available.
Inventors
- 👤 Herman G Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:25
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/08; F28F; F28F9/00; F28F9/02; F28F9/0202; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/428
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US722717A
Cited
US1061295A
Cited
US1288055A
Cited
US1589646A
Cited
US1753062A
Cited
US1862707A
Cited
US1897997A
Cited
US1934787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |