Patent US2592950A successfully refreshed from Google Patents.
US2592950A
Expired / Lapsed
US
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Heat exchange core
Assignee: FEDDERS QUIGAN CORP
•
Filing: 1948-09-24
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Granted: 1952-04-15
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Expires: 1968-09-24
Abstract
No abstract record available.
Inventors
- 👤 Przyborowski Stanislaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:23
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/126; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/486
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1522404A
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US1611894A
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US1950488A
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US2016822A
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US2083671A
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US2061100A
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US2106091A
Cited
GB450747A
Cited
US2252211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |