US2395543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange device
Assignee: Individual
•
Filing: 1943-07-14
•
Granted: 1946-02-26
•
Expires: 1963-07-14
Abstract
No abstract record available.
Inventors
- 👤 Andrew J Gallaher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:08
CPC Classifications
B; B01; B01D; B01D5/00; B01D5/0003; B01D5/0015; F; F24; F24D; F24D1/00; F24D1/005; F28; F28B; F28B1/00; F28B1/02; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0366; F28D1/0383; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/429
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) | 1949-02-25 | 1949-08-27 | 1950-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-02-25 | 1953-08-27 | 1954-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-02-25 | 1957-08-27 | 1958-02-26 | $7700.00 | Window Closed / Lapsed |