US3765904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of preparing extracts from vegetable products
Assignee: Air Liquide SA
•
Filing: 1971-02-11
•
Granted: 1973-10-16
•
Expires: 1991-02-11
Abstract
Abstract A method of recovering aromatic vapors released from vegetable products during comminution. A gaseous mixture of an easily condensable gas and a gas that is difficult to condense is used to sweep away aromatic vapors, the gaseous mixture then being cooled to condense said easily condensable gas and said aromatic vapors in a snow-like structure of said easily condensable gas.
Inventors
- 👤 Roissart H De
- 👤 C Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:52
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/46; A23F5/48; A23F5/486
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
16 words
A method as claimed in claim 1, in which said easily condensable gas is carbon dioxide.
Claim 2
Dependent Claim
16 words
A method as claimed in claim 1, in which said gas difficult to condense is nitrogen.
Claim 3
Dependent Claim
28 words
A method as claimed in claim 1, in which said easily condensable gas and said gas difficult to condense are present in said mixture in about equal volumes.
Claim 4
Dependent Claim
60 words
A method as claimed in claim 1, in which said easily condensable gas condenses at a temperature lower than water, and in which said condensation is conducted in two stages comprising a higher temperature stage in which water and undesirable vapors are condensed, and a subsequent lower temperature stage in which said easily condensable gas and desirable vapors are condensed.
Claim 5
Dependent Claim
16 words
A method as claimed in claim 5, in which said easily condensable gas is carbon dioxide.
Claim 6
Dependent Claim
21 words
A method as claimed in claim 6, in which said higher temperature stage has a temperature of -5* to -40* C.
Claim 7
Dependent Claim
21 words
A method as claimed in claim 6, in which said lower temperature stage has a temperature no higher than -50* C.
Claim 8
Dependent Claim
27 words
A method as claimed in claim 1, and recovering said aromatic vapors by subliming said snow-like structure and passing the sublimed vapors through the comminuted vegetable products.
Claim 9
Dependent Claim
22 words
A method as claimed in claim 1, and recovering said vapors by intimately admixing said snow-like structure with said comminuted vegetable products.
References Cited (Backward Citations)
US1367726A
Cited
US2306061A
Cited
US2680687A
Cited
US2875063A
Cited
US3021218A
Cited
US3223533A
Cited
US3087822A
Cited
US3535119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |