US2743088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger and drive transmission therefor
Assignee: Hudson Engineering Corp
•
Filing: 1950-10-19
•
Granted: 1956-04-24
•
Expires: 1970-10-19
Abstract
No abstract record available.
Inventors
- 👤 Bach Neal B Lau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:36
CPC Classifications
F; F04; F04D; F04D19/00; F04D19/002; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19633
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2271415A
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US2319060A
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US2346032A
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US2366376A
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US2401918A
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US2441446A
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US2536248A
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US2518760A
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US2645944A
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US2603196A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |