Patent US2484127A successfully refreshed from Google Patents.
US2484127A
Expired / Lapsed
US
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Heat exchange system
Assignee: Individual
•
Filing: 1944-10-30
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Granted: 1949-10-11
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Expires: 1964-10-30
Abstract
No abstract record available.
Inventors
- 👤 Stelzer William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:41
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0046; F24D; F24D11/00; F24D11/006; F24D11/007; F24S; F24S10/00; Y; Y02; Y02B; Y02B10/00; Y02B10/20; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10S; Y10S165/00; Y10S165/904; Y10S62/00; Y10S62/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US201439A
Cited
US845213A
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US1814897A
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US1768941A
Cited
US1821992A
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US2304124A
Cited
US2202019A
Cited
US2342211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |