Patent US4902503A successfully refreshed from Google Patents.
US4902503A
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US
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Antimicrobial latex composition
Assignee: Unitika Ltd
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Filing: 1988-11-23
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Granted: 1990-02-20
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Expires: 2008-11-23
Abstract
Abstract A first antimicrobial latex composition comprising a homogeneous blend of a natural rubber latex or a synthetic polymer latex and protein silver and a second antimicrobial latex composition comprising a homogeneous blend of a cationic natural rubber latex or a cationic synthetic polymer latex and a water-soluble silver compound, wherein each antimicrobial latex composition exhibits excellent long term stability during storage and can be readily prepared.
Inventors
- 👤 Yoshihiro Umemura
- 👤 Yasuhiko Ozaki
- 👤 Akihito Kawaide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:00
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/14; A61L29/16; A01; A01N; A01N59/00; A01N59/16; A61L29/04; A61L29/043; C; C08; C08K; C08K3/00; C08K3/28; C08L; C08L11/00; C08L11/02; C08L21/00; C08L21/02; C08L7/00; C08L7/02; A61L2300/00; A61L2300/10; A61L2300/102; A61L2300/104; A61L2300/20; A61L2300/252; A61L2300/40; A61L2300/404
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
21 words
An antimicrobial latex composition comprising a homogeneous mixture of a natural rubber latex or a synthetic polymer latex and protein silver.
Claim 2
Dependent Claim
21 words
An antimicrobial latex composition comprising a homogeneous mixture of a natural rubber latex or a synthetic polymer latex and protein silver.
Claim 3
Dependent Claim
28 words
An antimicrobial latex composition according to claim 1, wherein said natural rubber latex or said synthetic polymer latex has solids content of about 20 to 70% by weight.
Claim 4
Dependent Claim
28 words
An antimicrobial latex composition according to claim 2, wherein said natural rubber latex or said synthetic polymer latex has solids content of about 30 to 65% by weight.
Claim 5
Dependent Claim
36 words
An antimicrobial latex composition according to claim 1, wherein said protein silver is present in an amount of about 0.1 to 10% by weight, in terms of silver, based on the solids content of said latex.
Claim 6
Dependent Claim
36 words
An antimicrobial latex composition according to claim 4, wherein said protein silver is present in an amount of about 0.5 to 5% by weight, in terms of silver, based on the solids content of said latex.
Claim 7
Dependent Claim
27 words
An antimicrobial latex composition according to claim 1, wherein said latex is an anionic rubber latex and has a pH value of from about 8 to 11.
Claim 8
Dependent Claim
27 words
An antimicrobial latex composition according to claim 1, wherein said latex is a cationic rubber latex and has a pH value of from about 1 to 5.
Claim 9
Dependent Claim
25 words
An antimicrobial latex composition comprising a homogeneous mixture of a cationic natural rubber latex or a cationic synthetic polymer latex and a water-soluble silver compound.
Claim 10
Dependent Claim
25 words
An antimicrobial latex composition comprising a homogeneous mixture of a cationic natural rubber latex or a cationic synthetic polymer latex and a water-soluble silver compound.
Claim 11
Dependent Claim
30 words
An antimicrobial latex composition according to claim 8, wherein said cationic natural rubber latex or said cationic synthetic polymer latex has solids content of about 20 to 70% by weight.
Claim 12
Dependent Claim
30 words
An antimicrobial latex composition according to claim 9, wherein said cationic natural rubber latex or said cationic synthetic polymer latex has solids content of about 30 to 65% by weight.
Claim 13
Dependent Claim
37 words
An antimicrobial latex composition according to claim 8, wherein said water-soluble silver compound is present in an amount of about 0.1 to 30% by weight, in terms of silver, based on the solids content of said latex.
Claim 14
Dependent Claim
37 words
An antimicrobial latex composition according to claim 11, wherein said water-soluble silver compound is present in an amount of about 0.5 to 10% by weight, in terms of silver, based on the solids content of said latex.
Claim 15
Dependent Claim
35 words
An antimicrobial latex composition according to claim 8, wherein said water-soluble silver compound is at least one compound selected from the group consisting of silver nitrate, silver chlorate, silver fluoride, silver lactate, and silver picrate.
Claim 16
Dependent Claim
20 words
An antimicrobial latex composition according to claim 8, wherein said latex has a pH value of about 1 to 5.
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |