US5035784A
Expired / Lapsed
US
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Degradation of organic chemicals with titanium ceramic membranes
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1990-06-18
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Granted: 1991-07-30
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Expires: 2010-06-18
Abstract
Abstract Complex organic molecules, such as polychlorinated biphenyls can be degraded on porous titanium ceramic membranes by photocatalysis under ultraviolet light.
Inventors
- 👤 Marc A. Anderson
- 👤 Simonetta Tunesi
- 👤 Qunyin Xu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:30
CPC Classifications
A; A62; A62D; A62D3/00; A62D3/10; A62D3/17; A62D3/176; B; B01; B01J; B01J16/00; B01J16/005; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; A62D2101/00; A62D2101/20; A62D2101/22; A62D2101/28; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/914; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
51 words
A method of degrading complex organic molecules comprising the steps of exposing the organic molecules in solution to a ceramic porous membrane of titanium; and irradiating the titanium membrane with ultraviolet light wherein the step of exposing the complex organic molecules to the membrane includes adsorbing the molecules in the membrane.
Claim 2
Independent Claim
51 words
A method of degrading complex organic molecules comprising the steps of exposing the organic molecules in solution to a ceramic porous membrane of titanium; and irradiating the titanium membrane with ultraviolet light wherein the step of exposing the complex organic molecules to the membrane includes adsorbing the molecules in the membrane.
Claim 3
Independent Claim
41 words
A method of degrading complex organic molecules comprising the steps of exposing the complex organic molecules to a porous metal oxide ceramic membrane of a transition metal by adsorbing the molecules in the membrane and irradiating the membrane with ultraviolet light.
Claim 4
Independent Claim
41 words
A method of degrading complex organic molecules comprising the steps of exposing the complex organic molecules to a porous metal oxide ceramic membrane of a transition metal by adsorbing the molecules in the membrane and irradiating the membrane with ultraviolet light.
Claim 5
Dependent Claim
15 words
A method as claimed in claim 2 wherein the complex organic molecules are polychlorinated biphenyls.
Claim 6
Independent Claim
33 words
A method of degrading complex organic molecules comprising the steps of adsorbing the organic molecules in the gaseous phase into a porous metal oxide ceramic membrane and irradiating the membrane with ultraviolet light.
Claim 7
Independent Claim
33 words
A method of degrading complex organic molecules comprising the steps of adsorbing the organic molecules in the gaseous phase into a porous metal oxide ceramic membrane and irradiating the membrane with ultraviolet light.
Claim 8
Dependent Claim
12 words
A method as claimed in claim 4 wherein the metal is titanium.
Claim 9
Independent Claim
45 words
A method of degrading complex organic molecules comprising the steps of exposing the organic molecules in the gaseous phase to a porous metal oxide ceramic membrane and irradiating the membrane with ultraviolet light wherein the membrane is coated onto the exterior of the light source.
Claim 10
Independent Claim
45 words
A method of degrading complex organic molecules comprising the steps of exposing the organic molecules in the gaseous phase to a porous metal oxide ceramic membrane and irradiating the membrane with ultraviolet light wherein the membrane is coated onto the exterior of the light source.
Claim 11
Independent Claim
53 words
A method of degrading complex organic molecules comprising the steps of exposing the organic molecules in the gaseous phase to a porous metal oxide ceramic membrane and irradiating the membrane with ultraviolet light from an optical fiber wherein the membrane is coated onto the exterior of the optical fiber carrying the ultraviolet light.
Claim 12
Independent Claim
53 words
A method of degrading complex organic molecules comprising the steps of exposing the organic molecules in the gaseous phase to a porous metal oxide ceramic membrane and irradiating the membrane with ultraviolet light from an optical fiber wherein the membrane is coated onto the exterior of the optical fiber carrying the ultraviolet light.
Claim 13
Independent Claim
42 words
A method of degrading complex organic molecules comprising the steps of exposing the complex organic molecules to a porous metal oxide ceramic body of a transition metal by adsorbing the molecules in the body and irradiating the adsorbed molecules with ultraviolet light.
Claim 14
Independent Claim
42 words
A method of degrading complex organic molecules comprising the steps of exposing the complex organic molecules to a porous metal oxide ceramic body of a transition metal by adsorbing the molecules in the body and irradiating the adsorbed molecules with ultraviolet light.
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) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |