US3255608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid nitrogen immersion and spray freezing machine
Assignee: Elmwood Liquid Products Inc
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Filing: 1964-06-18
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Granted: 1966-06-14
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Expires: 1984-06-18
Abstract
No abstract record available.
Inventors
- 👤 Hamish K Macintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:03
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10; F25D3/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A FREEZE-DOWN MACHINE COMPRISING AN ELONGATED TUNNEL HAVING AN INLET AND AN OUTLET, SAID INLET LEADING INTO A DUCT SECTION COMMUNICATING WITH AN OPEN TROUGH SECTION ADJACENT SAID OUTLET AND CONTAINING A BATH OF A VOLATILE LIQUID COOLANT, LIQUID COOLANT SPRAY MEANS DISPOSED IN SAID TUNNEL ABOVE SAID TROUGH SECTION, A HATCH MEMBER DIS POSED OVER SAID BATH AND UNDER SAID SPRAY MEANS TO CLOSE SAID TROUGH SECTION AND THEREBY EXTENDING SAID DUCT SECTION THEREOVER, SAID HATCH MEMBER BEING REMOVABLE TO OPEN SAID TROUGH SECTION, AND CONVEYOR MEANS SELECTIVELY ADAPTED IN ONE OPERATIVE POSITION TO CONVEYOR FOOD FROM SAID INLET THROUGH SAID DUCT SECTION AND THEN THROUGH SAID OPEN THROUGH SECTION TO SAID OUTLET, AND IN ANOTHER OPERATIVE POSITION TO CONVEY FOOD FROM SAID INLET OVER SAID HATCH MEMBER UNDER SAID SPRAY MEANS TO SAID OUTLET.
Claim 2
Dependent Claim
136 words
A FREEZE-DOWN MACHINE COMPRISING AN ELONGATED TUNNEL HAVING AN INLET AND AN OUTLET, SAID INLET LEADING INTO A DUCT SECTION COMMUNICATING WITH AN OPEN TROUGH SECTION ADJACENT SAID OUTLET AND CONTAINING A BATH OF A VOLATILE LIQUID COOLANT, LIQUID COOLANT SPRAY MEANS DISPOSED IN SAID TUNNEL ABOVE SAID TROUGH SECTION, A HATCH MEMBER DIS POSED OVER SAID BATH AND UNDER SAID SPRAY MEANS TO CLOSE SAID TROUGH SECTION AND THEREBY EXTENDING SAID DUCT SECTION THEREOVER, SAID HATCH MEMBER BEING REMOVABLE TO OPEN SAID TROUGH SECTION, AND CONVEYOR MEANS SELECTIVELY ADAPTED IN ONE OPERATIVE POSITION TO CONVEYOR FOOD FROM SAID INLET THROUGH SAID DUCT SECTION AND THEN THROUGH SAID OPEN THROUGH SECTION TO SAID OUTLET, AND IN ANOTHER OPERATIVE POSITION TO CONVEY FOOD FROM SAID INLET OVER SAID HATCH MEMBER UNDER SAID SPRAY MEANS TO SAID OUTLET.
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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |