Patent US3422765A successfully refreshed from Google Patents.
US3422765A
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US
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Superconducting liquid helium pump
Assignee: General Electric Co
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Filing: 1967-03-24
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Granted: 1969-01-21
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Expires: 1987-03-24
Abstract
No abstract record available.
Inventors
- 👤 Karl F Schoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:25
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/02; F04B15/00; F04B15/06; F04B15/08; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B17/044; F04B53/00; F04B53/10; F04B53/102; Y; Y10; Y10S; Y10S417/00; Y10S417/901; Y10S505/00; Y10S505/825; Y10S505/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |