Patent US2943845A successfully refreshed from Google Patents.
US2943845A
Expired / Lapsed
US
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Heat exchanger for viscous fluids
Assignee: Individual
•
Filing: 1957-10-23
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Granted: 1960-07-05
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Expires: 1977-10-23
Abstract
No abstract record available.
Inventors
- 👤 Jaklitsch Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:41
CPC Classifications
F; F01; F01M; F01M5/00; F01M5/005; F01P; F01P11/00; F01P11/08; F28; F28D; F28D7/00; F28D7/02; F28D7/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1132420A
Cited
GB279446A
Cited
GB310157A
Cited
GB347904A
Cited
US2313705A
Cited
US2549687A
Cited
DE807939C
Cited
FR1132667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |