Patent US3415069A successfully refreshed from Google Patents.
US3415069A
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High pressure helium purifier
Assignee: National Aeronautics and Space Administration
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Filing: 1966-10-31
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Granted: 1968-12-10
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 John A Hauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:56
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/08; B; B01; B01D; B01D8/00; C; C01; C01B; C01B23/00; F25J2205/00; F25J2205/20; F25J2205/60; F25J2205/66; F25J2210/00; F25J2210/42; F25J2215/00; F25J2215/30; F25J2270/00; F25J2270/90; F25J2270/904; F25J2280/00; F25J2280/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR1364165A
Cited
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US3355860A
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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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |