Patent US2771942A successfully refreshed from Google Patents.
US3131143A
Expired / Lapsed
US
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Ultra-filtration apparatus and method
Assignee: Bayer Corp
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Filing: 1959-11-17
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Granted: 1964-04-28
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Expires: 1979-11-17
Abstract
No abstract record available.
Inventors
- 👤 Ferrari Andres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:29
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/14; B01D61/145; B01D61/18; B01D63/00; B01D63/08; B01D63/087; A; A61; A61M; A61M2206/00; A61M2206/10; A61M2206/12; Y; Y10; Y10S; Y10S159/00; Y10S159/27; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A METHOD OF ULTRAFILTRATION ACCORDING TO WHICH THE FILTER COMPRISES SEMI-PERMEABLE FILTER MATERIAL AND MEANS AT OPPOSITE SIDES, RESPECTIVELY, OF SAID FILTER MATERIAL FORMING WITH SAID FILTER MATERIAL FLUID PASSAGES AT SAID OPPOSITE SIDES, RESPECTIVELY, OF THE FILTER MATERIAL FOR THE PASSAGE OF FILTRATE FROM THE FLUID IN ONE OF SADI PASSAGES INTO THE OTHER OF SAID PASSAGES, SAID METHOD COMPRISING TRANSMITTING A STREAM OF FLUID TO BE FILTERED TO ONE OF SAID PASSAGES SIMUTANEOUSLY WITH THE TRANSMISSION TO THE OTHER OF SAID PASSAGES OF A SECOND STREAM OF FLUID FOR THE PASSAGE OF FILTRATE FROM SAID FIRST MENTIONED STREAM INTO THE FLUID OF SAID SECOND STREAM DURING THE CONCURRENT FLOW OF THE TWO STREAMS OF FLUID THROUGH SAID PASSAGES, SAID SECOND STREAM OF FLUID COMPRISING A REAGENT FOR THE TREATMENT OF SAID FILTRATE FOR QUANTITATIVE ANALYSIS OF SAID FIRST MENTIONED FLUID IN RESPECT TO SAID FILTRATE, AND CONTROLLING THE RATE OF PASSAGE OF SAID FILTRATE THROUGH SAID FILTER MATERIAL BY PUMPING FLUID INTO AND OUT OF SAID ONE OF THE PASSAGES AT DIFFERENT RATES OF FLOW.
Claim 2
Independent Claim
177 words
A METHOD OF ULTRAFILTRATION ACCORDING TO WHICH THE FILTER COMPRISES SEMI-PERMEABLE FILTER MATERIAL AND MEANS AT OPPOSITE SIDES, RESPECTIVELY, OF SAID FILTER MATERIAL FORMING WITH SAID FILTER MATERIAL FLUID PASSAGES AT SAID OPPOSITE SIDES, RESPECTIVELY, OF THE FILTER MATERIAL FOR THE PASSAGE OF FILTRATE FROM THE FLUID IN ONE OF SADI PASSAGES INTO THE OTHER OF SAID PASSAGES, SAID METHOD COMPRISING TRANSMITTING A STREAM OF FLUID TO BE FILTERED TO ONE OF SAID PASSAGES SIMUTANEOUSLY WITH THE TRANSMISSION TO THE OTHER OF SAID PASSAGES OF A SECOND STREAM OF FLUID FOR THE PASSAGE OF FILTRATE FROM SAID FIRST MENTIONED STREAM INTO THE FLUID OF SAID SECOND STREAM DURING THE CONCURRENT FLOW OF THE TWO STREAMS OF FLUID THROUGH SAID PASSAGES, SAID SECOND STREAM OF FLUID COMPRISING A REAGENT FOR THE TREATMENT OF SAID FILTRATE FOR QUANTITATIVE ANALYSIS OF SAID FIRST MENTIONED FLUID IN RESPECT TO SAID FILTRATE, AND CONTROLLING THE RATE OF PASSAGE OF SAID FILTRATE THROUGH SAID FILTER MATERIAL BY PUMPING FLUID INTO AND OUT OF SAID ONE OF THE PASSAGES AT DIFFERENT RATES OF FLOW.
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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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |