Patent US4865752A successfully refreshed from Google Patents.
US4865752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation and filtration membranes and their regeneration
Assignee: Individual
•
Filing: 1988-12-05
•
Granted: 1989-09-12
•
Expires: 2008-12-05
Abstract
Abstract A composition and method of cleansing and regenerating contaminated filtration membranes is described together with the synergized antimicrobial aqueous solution of an inorganic peroxide and a polymeric solubilized iodine complex. The membrane to be regenerated is of the type used in ultrafiltration, reverse osmosis and microfiltration and the construction and composition of the member is per se known.
Inventors
- 👤 Albert L. Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:10
CPC Classifications
B; B01; B01D; B01D65/00; B01D65/02; B01D2321/00; B01D2321/16; B01D2321/168
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
A process of treating clogged, slime coated or otherwise contaminated microporous filtration membranes, comprising: providing a contaminated membrane having pores of which are prevented by contaminants, slime or clogging matter from permitting the desired passage of liquid to be filtered, washing the contaminated membrane with sterile water in a forward and/or reverse direction or both, immersing the thus washed membrane in or with an antimicrobially enhanced aqueous solution of H 2 O 2 and PVPI of a concentration sufficient for removing said contaminants, slime or clogging matter from said membrane, and thereafter removing any undesired residue by washing with sterile water optionally followed by drying in a stream of warm air.
Claim 2
Dependent Claim
111 words
A process of treating clogged, slime coated or otherwise contaminated microporous filtration membranes, comprising: providing a contaminated membrane having pores of which are prevented by contaminants, slime or clogging matter from permitting the desired passage of liquid to be filtered, washing the contaminated membrane with sterile water in a forward and/or reverse direction or both, immersing the thus washed membrane in or with an antimicrobially enhanced aqueous solution of H 2 O 2 and PVPI of a concentration sufficient for removing said contaminants, slime or clogging matter from said membrane, and thereafter removing any undesired residue by washing with sterile water optionally followed by drying in a stream of warm air.
Claim 3
Dependent Claim
44 words
A method according to claim 1 wherein a membrane is physically removed from an assemblage of membranes mounted in close juxtaposition in filtration equipment, subjecting the membrane to the treatment described in claim 1 and replacing the removed membrane in the assemblage of membranes.
References Cited (Backward Citations)
US4113857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |