US3281950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freeze-drying process
Assignee: Individual
•
Filing: 1964-10-05
•
Granted: 1966-11-01
•
Expires: 1984-10-05
Abstract
No abstract record available.
Inventors
- 👤 Kautz Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR FREEZE-DRYING A FLUID SUBSTANCE WITHIN A GAS TIGHT CHAMBER COMPRISING THE STEPS OF: INTRODUCING A COOLING GAS INTO THE GAS TIGHT CHAMBER, MAINTAINING SAID COOLING GAS INTO THE GAS TIGHT CHAMBER AT A TEMPERTURE OF LESS THAN 0* C., COMBINING THE FLUID SUBSTANCE WITH A BOOST GAS, SPRAYING INTO THE GAS TIGHT CHAMBER THE COMBINED BOOTS GAS AND FLUID SUBSTANCE IN THE FORM OF A FINE DISPERSION COMPOSED OF DROPLETS OF SUCH SIZE AS TO BE FROZEN UPON CONTACT WITH SAID COOLING GAS BEFORE CONTACTING THE INNER SURFACE OF THE GAS TIGHT CHAMBER, AND PRODUCING SUBLIMATION OF THE FROZEN MOISTURE CONTAINED IN THE FLUID SUBSTANCE SO AS TO CAUSE DRYING THEREOF.
Claim 2
Dependent Claim
114 words
A PROCESS FOR FREEZE-DRYING A FLUID SUBSTANCE WITHIN A GAS TIGHT CHAMBER COMPRISING THE STEPS OF: INTRODUCING A COOLING GAS INTO THE GAS TIGHT CHAMBER, MAINTAINING SAID COOLING GAS INTO THE GAS TIGHT CHAMBER AT A TEMPERTURE OF LESS THAN 0* C., COMBINING THE FLUID SUBSTANCE WITH A BOOST GAS, SPRAYING INTO THE GAS TIGHT CHAMBER THE COMBINED BOOTS GAS AND FLUID SUBSTANCE IN THE FORM OF A FINE DISPERSION COMPOSED OF DROPLETS OF SUCH SIZE AS TO BE FROZEN UPON CONTACT WITH SAID COOLING GAS BEFORE CONTACTING THE INNER SURFACE OF THE GAS TIGHT CHAMBER, AND PRODUCING SUBLIMATION OF THE FROZEN MOISTURE CONTAINED IN THE FLUID SUBSTANCE SO AS TO CAUSE DRYING THEREOF.
References Cited (Backward Citations)
US1976204A
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US2020719A
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US2471035A
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US2751687A
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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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |