US3159494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of flour to reduce microbiological contamination
Assignee: Procter and Gamble Co
•
Filing: 1962-12-31
•
Granted: 1964-12-01
•
Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Lawrence Benjamin
- 👤 Alexander L Liepa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:08
CPC Classifications
A; A21; A21D; A21D6/00; A21D6/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD OF TREATING FLOUR TO SUBSTANTIALLY ELIMINATE NON-SPOREFORMING MICROORGANISMS THEREFROM, SAID METHOD COMPRISING THE STEPS OF SUBSTANTIALLY UNIFORMLY HEATING SAID FLOUR TO A TEMPERATURE WITHIN THE RANGE OF ABOUT 200250*F. AND MAINTAINING THE FLOUR AT SAID TEMPERATURE FOR A TIME OF AT LEAST 0.1 SECOND AND SUFFICIENT TO SUBSTANTIALLY DESTROY SAID NON-SPOREFORMING MICROORGANISMS WHILE SAID FLOUR IS IN INTIMATE CONTACT WITH AN ATMOSPHERE CONTAINING AT LEAST 10 MOL PERCENT STEAM AND AMINTAINED UNDER A PRESSURE PROVIDING AN ABSOLUTE PARTIAL PRESSURE OF STEAM OF AT LEAST ABOUT 1.5 P.S.I. AND THEN COOLING SAID FLOUR TO A TEMPERATURE BELOW THE DEGRADATION TEMPERATURE OF STARCH, THE FLOUR REMAINING AT A TEMPERATURE IN EXCESS OF SAID STARCH DEGRADATION TEMPERATURE FOR A TIME NOT GREATER THAN ABOUT 60 SECONDS.
Claim 2
Independent Claim
125 words
A METHOD OF TREATING FLOUR TO SUBSTANTIALLY ELIMINATE NON-SPOREFORMING MICROORGANISMS THEREFROM, SAID METHOD COMPRISING THE STEPS OF SUBSTANTIALLY UNIFORMLY HEATING SAID FLOUR TO A TEMPERATURE WITHIN THE RANGE OF ABOUT 200250*F. AND MAINTAINING THE FLOUR AT SAID TEMPERATURE FOR A TIME OF AT LEAST 0.1 SECOND AND SUFFICIENT TO SUBSTANTIALLY DESTROY SAID NON-SPOREFORMING MICROORGANISMS WHILE SAID FLOUR IS IN INTIMATE CONTACT WITH AN ATMOSPHERE CONTAINING AT LEAST 10 MOL PERCENT STEAM AND AMINTAINED UNDER A PRESSURE PROVIDING AN ABSOLUTE PARTIAL PRESSURE OF STEAM OF AT LEAST ABOUT 1.5 P.S.I. AND THEN COOLING SAID FLOUR TO A TEMPERATURE BELOW THE DEGRADATION TEMPERATURE OF STARCH, THE FLOUR REMAINING AT A TEMPERATURE IN EXCESS OF SAID STARCH DEGRADATION TEMPERATURE FOR A TIME NOT GREATER THAN ABOUT 60 SECONDS.
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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) | 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 |