US4328255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of extracting coffee oil containing aroma constituents from roasted coffee
Assignee: Studiengesellschaft Kohle gGmbH
•
Filing: 1977-06-08
•
Granted: 1982-05-04
•
Expires: 1997-06-08
Abstract
Abstract A method of extracting coffee oil containing aromatic constituents in high yield and in stable form by extracting solid, roasted coffee with dry carbon dioxide under super-critical conditions of temperature and pressure.
Inventors
- 👤 Wilhelm Roselius
- 👤 Otto Vitzthum
- 👤 Peter Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:32
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203; A; A23; A23F; A23F5/00; A23F5/46; A23F5/48; A23F5/483
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
In the method of extracting coffee oil, containing aromatic constituents, using carbon dioxide, the improvement for selectively extracting the oil in high yield and in stable form, which comprises extracting solid, roasted coffee with dry carbon dioxide under supercritical conditions of pressure of at least 80 atmospheres gauge and supercritical conditions of temperature of above 31.3° C.
Claim 2
Dependent Claim
57 words
In the method of extracting coffee oil, containing aromatic constituents, using carbon dioxide, the improvement for selectively extracting the oil in high yield and in stable form, which comprises extracting solid, roasted coffee with dry carbon dioxide under supercritical conditions of pressure of at least 80 atmospheres gauge and supercritical conditions of temperature of above 31.3° C.
Claim 3
Dependent Claim
21 words
Improvement according to claim 1, in which the extraction is effected in a temperature range of from 40° to 170° C.
Claim 4
Dependent Claim
22 words
Improvement according to claim 1, in which an oil fraction of about 10 to 12 weight percent of the coffee is extracted.
References Cited (Backward Citations)
GB1057911A
Cited
US3477856A
Cited
GB1106468A
Cited
US3843824A
Cited
US3806619A
Cited
US3939281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |