Patent US2991633A successfully refreshed from Google Patents.
US2991633A
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Joule-thomson effect cooling system
Assignee: TDK Micronas GmbH
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Filing: 1958-03-17
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Granted: 1961-07-11
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Expires: 1978-03-17
Abstract
No abstract record available.
Inventors
- 👤 Frank N Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:22
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F17C3/08; F17C3/085; F25; F25B; F25B9/00; F25B9/02; Y; Y10; Y10S; Y10S62/00; Y10S62/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2159251A
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US2502184A
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US2487863A
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US2509034A
Cited
US2763138A
Cited
US2725722A
Cited
US2909903A
Cited
US2913609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |