Patent US2941787A successfully refreshed from Google Patents.
US2941787A
Expired / Lapsed
US
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Apparatus for heat exchange
Assignee: PEDAR Ltd
•
Filing: 1956-10-09
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Granted: 1960-06-21
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Expires: 1976-10-09
Abstract
No abstract record available.
Inventors
- 👤 Ramen Torsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:57
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0006; F28D9/0031; F28D9/0037; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/432; Y10S165/433; Y10S165/434
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1057404A
Cited
US1823788A
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US1897113A
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US1990752A
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US2526157A
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US2456455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |