Patent US2948515A successfully refreshed from Google Patents.
US2948515A
Expired / Lapsed
US
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Heat transfer device
Assignee: Carrier Corp
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Filing: 1957-04-01
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Granted: 1960-08-09
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Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 Mehalick John Richard
- 👤 Edward R Izzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:08
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/30; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/32; Y; Y10; Y10S; Y10S165/00; Y10S165/228; Y10S165/302; Y10S165/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |