US3266169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum freeze drying apparatus
Assignee: Hupp Corp
•
Filing: 1962-10-31
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Granted: 1966-08-16
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Expires: 1982-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Horace L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:23
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
APPARATUS FOR FREEZE DRYING LIQUID AND SEMILIQUID PRODUCTS COMPRISING, IN COMBINATION: (A) A VACUUM CHAMBER; (B) MEANS FOR MAINTAINING SAID VACUUM CHAMBER AT A PRESSURE NOT EXCEEDING ABOUT 0.180 INCH OF MERCURY ABSOLUTE; (C) MEANS OUTSIDE SAID VACUUM CHAMBER FOR REDUCING THE PRODUCT TO A FINE FROZEN POWDER INCLUDING A VESSEL, MEANS FOR SPRAYING THE PRODUCT INTO THE VESSEL, A SOURCE OF INERT GAS, MEANS FOR REFRIGERATING SAID GAS, MEANS FOR EFFECTING AN UPWARD FLOW OF THE REFRIGERATED GAS THROUGH SAID VESSEL TO THEREBY CONTACT AND FREEZE SAID PRODUCT, AND A CYCLONE TYPE SEPARATOR FOR SEPARATING THE FROZEN PRODUCT FROM THE GAS; (D) A CONTINUOUSLY OPERATING CONVEYOR DISPOSED IN THE VACUUM CHAMBER;
Claim 2
Dependent Claim
112 words
APPARATUS FOR FREEZE DRYING LIQUID AND SEMILIQUID PRODUCTS COMPRISING, IN COMBINATION: (A) A VACUUM CHAMBER; (B) MEANS FOR MAINTAINING SAID VACUUM CHAMBER AT A PRESSURE NOT EXCEEDING ABOUT 0.180 INCH OF MERCURY ABSOLUTE; (C) MEANS OUTSIDE SAID VACUUM CHAMBER FOR REDUCING THE PRODUCT TO A FINE FROZEN POWDER INCLUDING A VESSEL, MEANS FOR SPRAYING THE PRODUCT INTO THE VESSEL, A SOURCE OF INERT GAS, MEANS FOR REFRIGERATING SAID GAS, MEANS FOR EFFECTING AN UPWARD FLOW OF THE REFRIGERATED GAS THROUGH SAID VESSEL TO THEREBY CONTACT AND FREEZE SAID PRODUCT, AND A CYCLONE TYPE SEPARATOR FOR SEPARATING THE FROZEN PRODUCT FROM THE GAS; (D) A CONTINUOUSLY OPERATING CONVEYOR DISPOSED IN THE VACUUM CHAMBER;
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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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |