US2991633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joule-thomson effect cooling system
Assignee: TDK Micronas GmbH
•
Filing: 1958-03-17
•
Granted: 1961-07-11
•
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 01:28
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1471832A
Cited
US1968518A
Cited
US2159251A
Cited
US2502184A
Cited
US2487863A
Cited
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 |