Patent US3879569A successfully refreshed from Google Patents.
US3879569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the decaffeination of raw coffee
Assignee: Hag AG
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Filing: 1973-03-12
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Granted: 1975-04-22
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Expires: 1993-03-12
Abstract
Abstract Raw coffee moistened to a water content of about 10 to 60% by weight is extracted with aqueous liquid carbon dioxide at a pressure above the critical pressure to extract caffein values therefrom. The caffein may be separately recovered.
Inventors
- 👤 Otto Vitzthum
- 👤 Peter Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:28
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/20; A23F5/22; A23F5/223; A23F5/206; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
58 words
A PROCESS FOR THE DECAFFEINATION OF RAW COFFEE COMPRISING MOISTENING RAW COFFEE TO A MOISTURE CONTENT OF FROM ABOUT 10 TO 60% EXTRACTING THE RAW COFFEE WITH LIQUID CARBON DIOXIDE AT A PRESSURE ABOVE THE CRITICAL PRESSURE OF CARBON DIOXIDE AND AT A TEMPERATURE WHEREIN SAID CARBON DIOXIDE IS MAINTAINED IN A LIQUID STATE AND BELOW ABOUT 31.4*C.
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE DECAFFEINATION OF RAW COFFEE COMPRISING MOISTENING RAW COFFEE TO A MOISTURE CONTENT OF FROM ABOUT 10 TO 60% EXTRACTING THE RAW COFFEE WITH LIQUID CARBON DIOXIDE AT A PRESSURE ABOVE THE CRITICAL PRESSURE OF CARBON DIOXIDE AND AT A TEMPERATURE WHEREIN SAID CARBON DIOXIDE IS MAINTAINED IN A LIQUID STATE AND BELOW ABOUT 31.4*C.
Claim 3
Dependent Claim
58 words
A process for the decaffeination of raw coffee comprising moistening raw coffee to a moisture content of from about 10 to 60% extracting the raw coffee with liquid carbon dioxide at a pressure above the critical pressure of carbon dioxide and at a temperature wherein said carbon dioxide is maintained in a liquid state and below about 31.4*C.
Claim 4
Dependent Claim
58 words
A process for the decaffeination of raw coffee comprising moistening raw coffee to a moisture content of from about 10 to 60% extracting the raw coffee with liquid carbon dioxide at a pressure above the critical pressure of carbon dioxide and at a temperature wherein said carbon dioxide is maintained in a liquid state and below about 31.4*C.
Claim 5
Dependent Claim
22 words
A process according to claim 1 wherein the process is carried out at a pressure of from about 80 to 400 atmospheres.
Claim 6
Dependent Claim
14 words
A process according to claim 1 wherein the carbon dioxide is saturated with water.
Claim 7
Dependent Claim
20 words
Process according to claim 1 wherein prior to extraction the raw coffee is expanded by treatment with water or steam.
Claim 8
Dependent Claim
71 words
A process for recovering high purity caffein from raw coffee, comprising moistening raw coffee to a moisture content of from about 10 to 60%, extracting said coffee with liquid carbon dioxide maintained at a pressure of from about 80 to 400 atmospheres and a temperature of from about 0*C to about 31.4*C for a period of between about 10 and 50 hours, and separating the extracted caffein from the carbon dioxide.
Claim 9
Dependent Claim
71 words
A process for recovering high purity caffein from raw coffee, comprising moistening raw coffee to a moisture content of from about 10 to 60%, extracting said coffee with liquid carbon dioxide maintained at a pressure of from about 80 to 400 atmospheres and a temperature of from about 0*C to about 31.4*C for a period of between about 10 and 50 hours, and separating the extracted caffein from the carbon dioxide.
Claim 10
Dependent Claim
26 words
Process according to claim 5, wherein the solvent media is conveyed in a closed circuit, and the separated caffein is adsorbed on a moist adsorption medium.
Claim 11
Dependent Claim
17 words
Process according to claim 5 wherein the caffein is separated from the liquid carbon dioxide by vaporization.
References Cited (Backward Citations)
DE2005293A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |