US3607280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A single column circulatory coffee extraction process
Assignee: Procter and Gamble Co
•
Filing: 1969-10-01
•
Granted: 1971-09-21
•
Expires: 1989-10-01
Abstract
Abstract A novel process for producing instant coffee extract utilizing apparatus which comprises a surge tank connected in a circulatory system with a single extraction column. Extract product is produced by manipulating the extract surge by circulating it through the extraction column and varying the extract and water temperatures previous to extraction and hydrolysis.
Inventors
- 👤 Richard F Durchholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:53
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/24; A23F5/26; A23F5/262
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
The process of claim 1 wherein in step (a) said extract temperature is adjusted to within the range of from 330* to 355* F.
Claim 2
Dependent Claim
33 words
The process of claim 1 wherein in step (a) said temperature adjusted extract is circulated through said extraction zone, said surge zone and said temperature adjusting zone for from 7 to 10 minutes.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein in step (b) said water is adjusted to a temperature within the range of from 330* to 355* F.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein in step (d) said extract temperature is adjusted to within the range of from 190* to 230* F.
Claim 5
Dependent Claim
15 words
The process of claim 5 wherein the draw off ratio is from 1.5 to 2.5.
References Cited (Backward Citations)
US2888349A
Cited
US3224879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |