US3800055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsating-flow coffee extraction process
Assignee: Procter and Gamble Co
•
Filing: 1973-07-11
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Granted: 1974-03-26
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Expires: 1993-07-11
Abstract
Abstract A method for increasing the rate of extraction in a coffee extraction column which comprises superimposing a pulsating flow on the feed water of a conventional coffee extraction column.
Inventors
- 👤 W Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:35
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/24; A23F5/26; A23F5/262
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
A process for increasing the rate of extraction in a continuous countercurrent coffee extraction process which comprises passing an extracting fluid continuously through a plurality of extraction colUmns containing ground coffee; and superimposing a pulsating flow onto said extracting fluid, thereby to cause pulsating flow; said pulsating flow having a frequency of from 0.5 to 30 cycles per minute, an amplitude ranging from one-thirtieth to one-third of the average flow rate of the extracting fluid and a Kinetic Ratio Number ranging from 1.1 to 25.
Claim 2
Dependent Claim
85 words
A process for increasing the rate of extraction in a continuous countercurrent coffee extraction process which comprises passing an extracting fluid continuously through a plurality of extraction colUmns containing ground coffee; and superimposing a pulsating flow onto said extracting fluid, thereby to cause pulsating flow; said pulsating flow having a frequency of from 0.5 to 30 cycles per minute, an amplitude ranging from one-thirtieth to one-third of the average flow rate of the extracting fluid and a Kinetic Ratio Number ranging from 1.1 to 25.
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein the pulsating flow is superimposed on the extracting fluid of the extraction process by means of one or more pumps with a piston-chamber arrangement suitable for water displacement.
Claim 4
Dependent Claim
100 words
In a continuous countercurrent coffee extraction process wherein an extracting fluid is passed through a plurality of extraction columns containing ground coffee and coffee extract is withdrawn from a fresh extraction column thereof, the improvement which comprises increasing the rate of extraction by superimposing a pulsating flow onto the extracting fluid of the extraction process, thereby to cause pulsating flow; said pulsating flow having a frequency of from 0.5 to 30 cycles per minute, an amplitude ranging from one-thirtieth to one-third of the average flow rate of the extracting fluid and a Kinetic Ratio Number ranging from 1.1 to 25.
Claim 5
Dependent Claim
100 words
In a continuous countercurrent coffee extraction process wherein an extracting fluid is passed through a plurality of extraction columns containing ground coffee and coffee extract is withdrawn from a fresh extraction column thereof, the improvement which comprises increasing the rate of extraction by superimposing a pulsating flow onto the extracting fluid of the extraction process, thereby to cause pulsating flow; said pulsating flow having a frequency of from 0.5 to 30 cycles per minute, an amplitude ranging from one-thirtieth to one-third of the average flow rate of the extracting fluid and a Kinetic Ratio Number ranging from 1.1 to 25.
Claim 6
Dependent Claim
21 words
The process of claim 3 wherein the pulsating flow is superimposed only on the extracting fluid of a fresh extraction column.
Claim 7
Dependent Claim
45 words
The process of claim 4 wherein the frequency of the pulsating flow is from 1 to 10 cycles per minute, the amplitude ranges from 1/12 to 1/4 the average flow rate of the feed water, and the Kinetic Ratio Number ranges from 1.1 to 25.
Claim 8
Dependent Claim
35 words
The process of claim 4 wherein the pulsating flow is superimposed on the extracting fluid of a fresh extraction column by means of one or more pumps with a piston-chamber arrangement suitable for water displacement.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |