Patent US3436837A successfully refreshed from Google Patents.
US3436837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed freeze drying
Assignee: United States Department of the Army
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Filing: 1963-08-13
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Granted: 1969-04-08
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Expires: 1983-08-13
Abstract
No abstract record available.
Inventors
- 👤 Ira Abelow
- 👤 Jack Wagman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:43
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/06; Y; Y10; Y10S; Y10S159/00; Y10S159/03; Y10S159/05; Y10S159/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A METHOD OF DRYING HEAT SENSITIVE MATERIALS WHICH COMPRISES FORMING THE MATERIAL INTO SMALL PIECES, FREEZING SAME, AND DRYING SAID FROZEN PIECES SUSPENDED IN A FLUIDIZED BED BY A MOVING STREAM OF DRYING FLUID.
Claim 2
Independent Claim
34 words
A METHOD OF DRYING HEAT SENSITIVE MATERIALS WHICH COMPRISES FORMING THE MATERIAL INTO SMALL PIECES, FREEZING SAME, AND DRYING SAID FROZEN PIECES SUSPENDED IN A FLUIDIZED BED BY A MOVING STREAM OF DRYING FLUID.
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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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |