US3762930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical pressure roasting of coffee
Assignee: General Foods Corp
•
Filing: 1971-04-16
•
Granted: 1973-10-02
•
Expires: 1991-04-16
Abstract
Abstract Green coffee either whole, flaked or ground is subjected to heat and a mechanical force preferably containing a shearing component sufficient to roast the coffee. The roasting produces a roasted coffee product having higher soluble solids whether atmospherically or pressure extracted compared to a conventional hot air roasts. The increased soluble solids content provides regular coffee wherein substantial reductions in the amount of coffee employed to prepare a brew are possible and in addition provides a soluble percolate of higher concentrations and at better yield in the manufacture of soluble coffee. The mechanical pressure roasting further provides improved controllable acidity but not in the order of that obtained by pressure roasting in the presence of large excesses of steam. The mechanical pressure roasting of coffee has been found to upgrade the flavor of Robusta-type coffees by removing typically tarry notes.
Inventors
- 👤 J Mahlmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
A; A23; A23N; A23N12/00; A23N12/08; A23F; A23F5/00; A23F5/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
13 words
The method of claim 1 wherein the coffee is whole green coffee beans.
Claim 2
Dependent Claim
38 words
The method of claim 2 wherein the coffee is partially roasted, sufficient to develop greater soluble solids than normally produced by conventional roasting and the partially roasted coffee is next conventionally roasted to the desired degree of roast.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein th coffee is subdivided green coffee beans.
Claim 4
Dependent Claim
17 words
The method of claim 4 wherein the green coffee is pre-treated by extraction of naturally occurring caffeine.
Claim 5
Dependent Claim
17 words
The method of claim 4 wherein the green coffee is pretreated by extraction of naturally occurring oils.
Claim 6
Dependent Claim
9 words
The product produced by the process of claim 1.
Claim 7
Dependent Claim
33 words
The method of claim 1 in which the roasted coffee is extracted with water to produce a water extract having improved soluble solids content over conventionally roasted coffee extracted in the same manner.
Claim 8
Dependent Claim
21 words
The method of claim 8 in which the extraction is carried out to recover both atmospheric extractable and autoclave extractable solids.
Claim 9
Dependent Claim
18 words
The method of claim 8 in which the roasted coffee is extracted with a dilute aqueous coffee extract.
Claim 10
Dependent Claim
14 words
The method of claim 8 in which the coffee is extracted employing intercolumn heating.
Claim 11
Dependent Claim
15 words
The method of claim 8 in which atmospheric and autoclave coffee solids are removed separately.
Claim 12
Dependent Claim
25 words
The method of claim 1 in which low cost coffee is roasted effective to reduce the tarry flavor normally associated with roasted low cost coffee.
Claim 13
Dependent Claim
13 words
The method of claim 13 in which the loW cost coffee is Robusta.
Claim 14
Dependent Claim
33 words
The method of claim 1 in which the roasted coffee is further ground and packaged in a porous material effective to give faster extraction of solids during brewing and a greater brew concentration.
Claim 15
Dependent Claim
20 words
The method of claim 1 in which the roasted coffee is post-treated to reduce the acid content of the coffee.
Claim 16
Dependent Claim
15 words
The method of claim 1 in which roasting is carried out under an inert atmosphere.
Claim 17
Dependent Claim
20 words
The method of claim 1 in which the green coffee is pretreated to modify the moisture content of the coffee.
Claim 18
Dependent Claim
14 words
The method of claim 1 in which one or more coffee aromas are removed.
Claim 19
Dependent Claim
29 words
The method of claim 1 in which the coffee being roasted is subjected to a vacuum source during roasting to remove at least part of the gaseous roaster environment.
Claim 20
Dependent Claim
19 words
The method of claim 1 in which part of the heat is developed by compaction occurring within the extruder.
Claim 21
Dependent Claim
13 words
The method of claim 1 in which coffee oil is removed during roasting.
Claim 22
Dependent Claim
25 words
The method of claim 1 in which the development of acidity and sourness is controlled by controlling the green bean moisture content prior to roasting.
Claim 23
Dependent Claim
25 words
The method of claim 1 in which the temperature of the coffee beans prior to roasting is controlled within the range of 0*F to 350*F.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |