Patent US3421574A successfully refreshed from Google Patents.
US3421574A
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Method and apparatus for vaporizing and superheating cold liquefied gas
Assignee: Niagara Blower Co
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Filing: 1966-03-11
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Granted: 1969-01-14
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Expires: 1986-03-11
Abstract
No abstract record available.
Inventors
- 👤 Walter Kals
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:15
CPC Classifications
F; F17; F17C; F17C9/00; F17C9/02; F25; F25B; F25B9/00; F25B9/002; F25B9/004; F17C2201/00; F17C2201/01; F17C2201/0138; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2227/00; F17C2227/03; F17C2227/0302; F17C2227/0367; F17C2227/0388; F17C2227/0393
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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |