US2787256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Individual
•
Filing: 1952-07-22
•
Granted: 1957-04-02
•
Expires: 1972-07-22
Abstract
No abstract record available.
Inventors
- 👤 Ilune Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:31
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/24; F24H1/26; F24H1/28; F24H1/282; F22; F22B; F22B1/00; F22B1/22; F24D; F24D3/00; F24D3/02; Y; Y10; Y10S; Y10S122/00; Y10S122/01; Y10S122/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US484350A
Cited
US1704038A
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US1814605A
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US1841230A
Cited
US1970747A
Cited
US2174663A
Cited
US2223856A
Cited
US2301683A
Cited
US2545903A
Cited
US2552044A
Cited
US2593032A
Cited
US2621635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |