Patent US3242073A successfully refreshed from Google Patents.
US3242073A
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Removal of microorganisms from fluids
Assignee: Dow Chemical Co
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Filing: 1963-03-07
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Granted: 1966-03-22
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Expires: 1983-03-07
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Guebert
- 👤 Johnnie D Laman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:33
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/288; B; B01; B01D; B01D15/00; B01D37/00; B01D37/02; B01D37/03; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/14; B01J20/22; B01J20/26; B01J20/262; B01J20/28; B01J20/28002; B01J20/28004; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3242; B01J20/3268; B01J20/3272; B01J2220/00; B01J2220/50; B01J2220/56; B01J2220/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD FOR THE REMOVAL OF MICROORGANISMS FROM FLUIDS WHICH COMPRISES PASSING A FLUID CONTAINING MICROORGANISMS THROUGH AN ANIONIC-TYPE FILTER AID HAVING AN ADHERENT COATING OF AN ORGANIC, CATIONIC, POLYELECTROLYTE, WHICH HAS A MINIMUM OF ABOUT 10 CATIONIC CHARGE SITES PER MOLECULE, SAID COATING CONSTITUTING FROM ABOUT 0.01 TO 2 PERCENT OF THE TOTAL WEIGHT OF THE COATED FILTER AID.
Claim 2
Independent Claim
60 words
A METHOD FOR THE REMOVAL OF MICROORGANISMS FROM FLUIDS WHICH COMPRISES PASSING A FLUID CONTAINING MICROORGANISMS THROUGH AN ANIONIC-TYPE FILTER AID HAVING AN ADHERENT COATING OF AN ORGANIC, CATIONIC, POLYELECTROLYTE, WHICH HAS A MINIMUM OF ABOUT 10 CATIONIC CHARGE SITES PER MOLECULE, SAID COATING CONSTITUTING FROM ABOUT 0.01 TO 2 PERCENT OF THE TOTAL WEIGHT OF THE COATED FILTER AID.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |