Patent US3790689A successfully refreshed from Google Patents.
US3790689A
Expired / Lapsed
US
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Extraction of roasted and ground coffee
Assignee: General Foods Corp
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Filing: 1972-04-24
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Granted: 1974-02-05
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Expires: 1992-04-24
Abstract
Abstract In a process for split-extraction percolation of roasted and ground coffee it has been discovered that by rapidly draining, or blowing out the extraction liquor form the fresh stage extraction column, a coffee extract of improved quality is obtained. Also, it has been discovered that if the secondary extract form the autoclave section is contacted with fresh-roasted and ground coffee, the quality of the secondary extract is upgraded. The preceding steps in combination is a preferred method of practicing split-extraction percolation.
Inventors
- 👤 E Pitchon
- 👤 E Earle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:08
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/24; A23F5/26; A23F5/262
Claims Analysis
Total Claims: 0
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |