US3108876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of decaffeinated instant coffee
Assignee: Duncan Coffee Co
•
Filing: 1961-05-09
•
Granted: 1963-10-29
•
Expires: 1981-05-09
Abstract
No abstract record available.
Inventors
- 👤 Harry H Turken
- 👤 Thomas P Daly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:02
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/20; A23F5/22; A23F5/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF MAKING DECAFFEINATED, INSTANT COFFEE WHICH COMPRISES PASSING A COFFEE CONCENTRATE OVER A BED OF AN ION EXCHANGE RESIN OF THE CATIN EXCHANGE TYPE USED IN THE HYDROGEN CYCLE WHICH IS CAPABLE OF PREFERENTIALLY ABSORBING CAFFEINE UNTIL THE CAFEINE CONTENT OF THE CONCENTRATE HAS BEEN REDUCED TO THE ORDER OF ABOUT 0.1 PERCENT WITH A REDUCTION IN THE PH VALUE OF THE CONCENTRATE, IMMEDIATLEY RAISING THE PH OF THE CONCENTRATE TO A VALUE OF ABOUT 5.0 TO 5.2 BY THE ADDITION OF AN AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE, SODIUM CARBONATE, POTASSIUM CARBONATE,
Claim 2
Independent Claim
100 words
THE METHOD OF MAKING DECAFFEINATED, INSTANT COFFEE WHICH COMPRISES PASSING A COFFEE CONCENTRATE OVER A BED OF AN ION EXCHANGE RESIN OF THE CATIN EXCHANGE TYPE USED IN THE HYDROGEN CYCLE WHICH IS CAPABLE OF PREFERENTIALLY ABSORBING CAFFEINE UNTIL THE CAFEINE CONTENT OF THE CONCENTRATE HAS BEEN REDUCED TO THE ORDER OF ABOUT 0.1 PERCENT WITH A REDUCTION IN THE PH VALUE OF THE CONCENTRATE, IMMEDIATLEY RAISING THE PH OF THE CONCENTRATE TO A VALUE OF ABOUT 5.0 TO 5.2 BY THE ADDITION OF AN AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE, SODIUM CARBONATE, POTASSIUM CARBONATE,
References Cited (Backward Citations)
US2509051A
Cited
US2933395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |