US3159493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sterilizing flour with minimum physicochemical change
Assignee: Procter and Gamble Co
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Filing: 1962-12-31
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Granted: 1964-12-01
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Cornelis H Japikse
- 👤 Lawrence Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:44
CPC Classifications
A; A21; A21D; A21D6/00; A21D6/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF ESSENTIALLY STERILIZING PULVERULENT FLOUR CONTAMINATED BY MICROORGANISMS, SAID METHOD COMPRISING THE STEPS OF RAPIDLY AND SUBSTANTIALLY UNIFORMLY HEATING SAID MATERIAL TO A TEMPERATURE WITHIN THE RANGE OF ABOUT 260-310*F., MAINTAINING SAID MATERIAL AT A TEMPERATURE WITHIN SAID RANGE IN CONTACT WITH AN ATMOSPHERE CONTAINING STEAM IN THE PROPORTION OF ABOUT 10-80 MOL PERCENT UNDER A PRESSURE OF ABOUT 5-40 P.S.I.G. FOR A TOTAL TIME OF ABOUT 1-10 MINUTES AND SUFFICIENT TO ESSENTIALLY DESTROY THE MICROORGANISMS THEREIN, AND RAPIDLY COOLING SAID MATERIAL TO A TEMPERATURE BELOW THE DEGRADATION POINT OF THE STARCH.
Claim 2
Independent Claim
94 words
A METHOD OF ESSENTIALLY STERILIZING PULVERULENT FLOUR CONTAMINATED BY MICROORGANISMS, SAID METHOD COMPRISING THE STEPS OF RAPIDLY AND SUBSTANTIALLY UNIFORMLY HEATING SAID MATERIAL TO A TEMPERATURE WITHIN THE RANGE OF ABOUT 260-310*F., MAINTAINING SAID MATERIAL AT A TEMPERATURE WITHIN SAID RANGE IN CONTACT WITH AN ATMOSPHERE CONTAINING STEAM IN THE PROPORTION OF ABOUT 10-80 MOL PERCENT UNDER A PRESSURE OF ABOUT 5-40 P.S.I.G. FOR A TOTAL TIME OF ABOUT 1-10 MINUTES AND SUFFICIENT TO ESSENTIALLY DESTROY THE MICROORGANISMS THEREIN, AND RAPIDLY COOLING SAID MATERIAL TO A TEMPERATURE BELOW THE DEGRADATION POINT OF THE STARCH.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |