Patent US3405531A successfully refreshed from Google Patents.
US3405531A
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Method and apparatus of refrigeration using cryogenic liquid
Assignee: HAROLD E DAVIS JR
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Filing: 1966-11-29
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Granted: 1968-10-15
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Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Harold E Davis
- 👤 Robert J Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:05
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10; F25D3/11; A; A23; A23B; A23B2/00; A23B2/80; A23B2/85; A23B2/88
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3039276A
Cited
US3114248A
Cited
US3238736A
Cited
US3298188A
Cited
US3287932A
Cited
US3277657A
Cited
US3315489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |