Patent US2287334A successfully refreshed from Google Patents.
Patent US3970530A successfully refreshed from Google Patents.
US3970530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and system for the destruction and/or limitation of the reproduction of micro-organisms in nutritive media
Assignee: Battelle Memorial Institute Inc
•
Filing: 1974-08-06
•
Granted: 1976-07-20
•
Expires: 1994-08-06
Abstract
Abstract The reproduction, growth and multiplication of microorganisms and their destruction in a nutritive medium which is electrically conductive is effected by introducing into the medium ions of at least one oligodynamic transition metal by providing on a roughened surface within a container for that medium a multiplicity of galvanic couples each including an anode of the transition metal and a cathode constituted by at least one metal having a standard oxidation potential lower than that of the transition metal. The surface is designed to provide a multiplicity of triple contact points between the anodic metal, the cathodic metal and the medium.
Inventors
- 👤 Bohdan Maslowski
- 👤 Dimitri Tzanos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:06
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61L; A61L2/00; A61L2/16; A61L2/23; A61L2/238; A61Q; A61Q17/00; C; C02; C02F; C02F1/00; C02F1/46; C02F1/4606; C02F1/461; C02F1/46104; C02F1/46176; C02F1/50; C02F1/505; A61K2800/00; A61K2800/40; A61K2800/52; A61K2800/524; A61K2800/80; A61K2800/83
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
145 words
A method of checking the growth of micro-organisms in an electrically conductive medium contaning nutrients conductive to the proliferation of such micro-organisms, comprising the steps of: placing said medium in a container for prolonged storage; and contacting said medium in said container with an anodic and a cathodic material constituting electrical couples for the autosolubilization in said medium of an oligodynamic transistion metal forming part of said anodic material, said cathodic material consisting of at least one metal more noble than said oligodynamic metal, said anodic and cathodic materials adhering to a rough surface of a substrate with a multiplicity of cavities whose mean size in all dimensions lies in a range of 50 to 2000 microns, said surface forming a multiplicity of triple-contact points between said anodic material, said cathodic material and said medium, at least one of said materials being in granular form.
Claim 2
Independent Claim
145 words
A method of checking the growth of micro-organisms in an electrically conductive medium contaning nutrients conductive to the proliferation of such micro-organisms, comprising the steps of: placing said medium in a container for prolonged storage; and contacting said medium in said container with an anodic and a cathodic material constituting electrical couples for the autosolubilization in said medium of an oligodynamic transistion metal forming part of said anodic material, said cathodic material consisting of at least one metal more noble than said oligodynamic metal, said anodic and cathodic materials adhering to a rough surface of a substrate with a multiplicity of cavities whose mean size in all dimensions lies in a range of 50 to 2000 microns, said surface forming a multiplicity of triple-contact points between said anodic material, said cathodic material and said medium, at least one of said materials being in granular form.
Claim 3
Dependent Claim
12 words
The method defined in claim 1 wherein said oligodynamic metal is silver.
Claim 4
Dependent Claim
22 words
The method defined in claim 1 wherein said more noble metal is selected from the group which consists of gold and platinum.
Claim 5
Dependent Claim
29 words
The method defined in claim 1 wherein said anodic material is silver alloyed with at least one metal selected from the group which consists of copper, bismuth and lead.
Claim 6
Dependent Claim
19 words
The method defined in claim 1 wherein said anodic material is a silver-lead alloy containing 90% by weight silver.
Claim 7
Dependent Claim
138 words
A package for the prolonged storage without spoilage of an electrically conductive medium containing nutrients conducive to the proliferation of micro-organisms, comprising: a container filled with said medium; a solid substrate in said container having a rough surface with a multiplicity of cavities whose mean size in all dimension lies in a range of 50 to 2000 microns; an anodic material consisting of at least one oligodynamic transition metal on said surface; and a cathodic material consisting of at least one metal more noble than said oligodynamic metal adhering to said surface, said anodic and cathodic materials constituting electrical couples for the autosolubilization of said oligodynamic metal in said medium, at least one of said materials being in granular form, said surface forming a multiplicity of triple-contact points between said anodic material, said cathodic material and said medium.
Claim 8
Dependent Claim
138 words
A package for the prolonged storage without spoilage of an electrically conductive medium containing nutrients conducive to the proliferation of micro-organisms, comprising: a container filled with said medium; a solid substrate in said container having a rough surface with a multiplicity of cavities whose mean size in all dimension lies in a range of 50 to 2000 microns; an anodic material consisting of at least one oligodynamic transition metal on said surface; and a cathodic material consisting of at least one metal more noble than said oligodynamic metal adhering to said surface, said anodic and cathodic materials constituting electrical couples for the autosolubilization of said oligodynamic metal in said medium, at least one of said materials being in granular form, said surface forming a multiplicity of triple-contact points between said anodic material, said cathodic material and said medium.
Claim 9
Dependent Claim
15 words
A package as defined in claim 6 wherein said substrate is a fritted glass plate.
Claim 10
Dependent Claim
17 words
A package as defined in claim 6 wherein said substrae is an integral part of said container.
Claim 11
Dependent Claim
19 words
A package as defined in claim 6 wherein said anodic material forms a thin layer on said rough surface.
References Cited (Backward Citations)
US1850594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |