Patent US5643971A successfully refreshed from Google Patents.
US5643971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Durable anti-microbial agents
Assignee: 3M Co
•
Filing: 1995-05-16
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Granted: 1997-07-01
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Expires: 2015-05-16
Abstract
Abstract The present invention comprises a metal complex capable of being dispersed in or alternatively, formed in a water-absorbing article. The metal complex consists of one or more metal ions, at least one chelating polymer chelated to the transition metal ion and at least one potentiator chelated to the transition metal ion. The chelating polymer may be a polyglucosamine, a polycarboxylic acid, a polyamine and methylene-acrylic acid polymer.
Inventors
- 👤 Karl F. Roenigk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:51
CPC Classifications
A; A01; A01N; A01N43/00; A01N43/34; A01N43/40; A01N25/00; A01N25/08; A01N25/10; A01N25/34; A01N43/02; A01N43/04; A01N43/14; A01N43/16; A01N43/48; A01N43/50; A01N43/52; A01N43/72; A01N43/74; A01N43/78; A01N57/00; A01N57/10; A01N57/14; A01N59/00; A01N59/06; A01N59/16; A01N59/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
A substantially water insoluble metal complex comprising: a. at least one chelating polymer selected from the group consisting of polyglucosamine, polycarboxylic acid, polyamine and ethylene acrylic acid copolymer; b. one or more metal ions chelated to said chelating polymer said metal ions selected from the group consisting of a transition metal ions, non-transition metal ions capable of existing in more than one valence state, zinc and aluminum; and c. at least one potentiator chelated to said transition metal ion.
Claim 2
Dependent Claim
79 words
A substantially water insoluble metal complex comprising: a. at least one chelating polymer selected from the group consisting of polyglucosamine, polycarboxylic acid, polyamine and ethylene acrylic acid copolymer; b. one or more metal ions chelated to said chelating polymer said metal ions selected from the group consisting of a transition metal ions, non-transition metal ions capable of existing in more than one valence state, zinc and aluminum; and c. at least one potentiator chelated to said transition metal ion.
Claim 3
Dependent Claim
22 words
The complex of claim 1 wherein said transition metal ion is selected from the group consisting of zinc, zirconium, copper and aluminum.
Claim 4
Dependent Claim
11 words
The complex of claim 1 wherein said chelating polymer is chitosan.
Claim 5
Dependent Claim
25 words
The complex of claim 1 wherein said potentiator is selected from the group consisting of an imidazole, a pyrithione, a thiazole and an alkyl dithiocarbamate.
Claim 6
Dependent Claim
9 words
The complex of claim 1 further including zinc oxide.
Claim 7
Dependent Claim
67 words
A substantially water insoluble metal complex comprising: a. at least one chelating polymer consisting of chitosan; b. one or more metal ions chelated to said chelating polymer said metal ions selected from the group consisting of a transition metal ions, non-transition metal ions capable of existing in more than one valence state, zinc and aluminum; and c. at least one potentiator chelated to said transition metal ion.
Claim 8
Dependent Claim
67 words
A substantially water insoluble metal complex comprising: a. at least one chelating polymer consisting of chitosan; b. one or more metal ions chelated to said chelating polymer said metal ions selected from the group consisting of a transition metal ions, non-transition metal ions capable of existing in more than one valence state, zinc and aluminum; and c. at least one potentiator chelated to said transition metal ion.
Claim 9
Dependent Claim
25 words
The complex of claim 6 wherein said potentiator is selected from the group consisting of an imidazole, a pyrithione, a thiazole and an alkyl dithiocarbamate.
Claim 10
Dependent Claim
9 words
The complex of claim 6 further including zinc oxide.
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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) | 2000-06-30 | 2000-12-30 | 2001-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-30 | 2004-12-30 | 2005-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-30 | 2008-12-30 | 2009-07-01 | $7700.00 | Window Closed / Lapsed |