Patent US3293771A successfully refreshed from Google Patents.
US3293771A
Expired / Lapsed
US
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Apparatus for treatment of flour to reduce microbiological contamination
Assignee: Procter and Gamble Co
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Filing: 1964-05-01
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Granted: 1966-12-27
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Expires: 1984-05-01
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 06:45
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/40; A23B2/42; A23B2/425; A21; A21D; A21D6/00; A21D6/003; B; B01; B01J; B01J8/00; B01J8/0015; B01J8/002; B01J8/08; B01J8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A MULTI-STAGE FLUIDIZATION APPARATUS FOR CONTACTING A PLUVERULENT SOLID WITH A PLURALITY OF GASEOUS ATMOSPHERES IN CONTINUOUS SUCCESSION WITHOUT SUBSTANTIAL MIXING OF SAID ATOMPSHERES, SAID APPARATUS COMPRISING A FIRST FLUIDIZATION TUBE, MEANS FOR INTRODUCING SAID SOLID AT A CONTROLLED RATE IN ADMIXTURE WITH A FIRST FLUIDIZING GAS INTO ONE END OF SAID FIRST TUBE, A SECOND FLUIDIZING TUBE, MEANS AT THE OTHER END OF SAID FIRST TUBE FOR SEPARATING SAID SOLID FROM SAID FIRST FLUIDIZING GAS WHILE EXHAUSTING THE LATTER TO THE ATMOSPHERE, AND FOR CONTINUOUSLY DELIVERING SAID SEPARATED SOLID TO ONE END OF SAID SECOND TUBE, SAID LAST-NAMED MEANS ESTABLISHING A CLOSED PATH BETWEEN THE RESPECTIVE ENDS OF SAID TUBES, MEANS FOR INTRODUCING INTO SAID ONE END OF SAID SECOND TUBE A SECOND FLUIDIZING GAS INCOMPATIBLE WITH SAID FIRST FLUIDIZING GAS, MEANS FOR REGULATING THE PRESSURE IN SAID SEC-
Claim 2
Dependent Claim
140 words
A MULTI-STAGE FLUIDIZATION APPARATUS FOR CONTACTING A PLUVERULENT SOLID WITH A PLURALITY OF GASEOUS ATMOSPHERES IN CONTINUOUS SUCCESSION WITHOUT SUBSTANTIAL MIXING OF SAID ATOMPSHERES, SAID APPARATUS COMPRISING A FIRST FLUIDIZATION TUBE, MEANS FOR INTRODUCING SAID SOLID AT A CONTROLLED RATE IN ADMIXTURE WITH A FIRST FLUIDIZING GAS INTO ONE END OF SAID FIRST TUBE, A SECOND FLUIDIZING TUBE, MEANS AT THE OTHER END OF SAID FIRST TUBE FOR SEPARATING SAID SOLID FROM SAID FIRST FLUIDIZING GAS WHILE EXHAUSTING THE LATTER TO THE ATMOSPHERE, AND FOR CONTINUOUSLY DELIVERING SAID SEPARATED SOLID TO ONE END OF SAID SECOND TUBE, SAID LAST-NAMED MEANS ESTABLISHING A CLOSED PATH BETWEEN THE RESPECTIVE ENDS OF SAID TUBES, MEANS FOR INTRODUCING INTO SAID ONE END OF SAID SECOND TUBE A SECOND FLUIDIZING GAS INCOMPATIBLE WITH SAID FIRST FLUIDIZING GAS, MEANS FOR REGULATING THE PRESSURE IN SAID SEC-
References Cited (Backward Citations)
GB463060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |