US2569075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of enzymatic discoloration of potatoes
Assignee: Individual
•
Filing: 1946-03-21
•
Granted: 1951-09-25
•
Expires: 1966-03-21
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Schade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:28
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/005; A23B7/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE PREVENTION OF ENZYMATIC POTATO DISCOLORATION, COMPRISING IMMERSING A PEELED POTATO IN AN ELECTRICALLY CONDUCTIVE LIQUID HAVING A RESISTANCE TO AN ELECTRIC CURRENT BELOW THE RESISTANCE OF AN UNCOOKED PEELED POTATO AND ABOVE THE RESISTANCE OF A COOKED PEELED POTATO TO ELECTRIC CURRENT, AND PASSING A HIGH-FREQUENCY ALTERNATING ELECTRIC CURRENT THROUGH SAID LIQUID COOKED.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE PREVENTION OF ENZYMATIC POTATO DISCOLORATION, COMPRISING IMMERSING A PEELED POTATO IN AN ELECTRICALLY CONDUCTIVE LIQUID HAVING A RESISTANCE TO AN ELECTRIC CURRENT BELOW THE RESISTANCE OF AN UNCOOKED PEELED POTATO AND ABOVE THE RESISTANCE OF A COOKED PEELED POTATO TO ELECTRIC CURRENT, AND PASSING A HIGH-FREQUENCY ALTERNATING ELECTRIC CURRENT THROUGH SAID LIQUID COOKED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |