US4533435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antimicrobial paper
Assignee: Microban Products Co
•
Filing: 1984-06-07
•
Granted: 1985-08-06
•
Expires: 2004-06-07
Abstract
Abstract An antimicrobial additive is incorporated into the binding agent of a heavy-duty, kraft-type paper having the characteristics of substantial density, air impermeability, and improved printability. The antimicrobial additive migrates from within the binding agent onto the paper fibers to substantially eliminate growth of micro-organisms thereon.
Inventors
- 👤 Henry S. Intili
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:55
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/34; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/63; D21H17/67; D21H21/00; D21H21/14; D21H21/36; D21H5/00; D21H5/22; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
167 words
An antimicrobial paper for packaging surgical supplies and other goods to be maintained in a sterile condition, said paper comprising: (a) a slurry of paper forming fibers prepared according to a wetlaid process; (b) a polymeric binding agent incorporated in said slurry, said binding agent being selected from the group containing acrylics, polyvinyl acetates, vinyl acetate-ethylenes, polyvinyl chlorides, and styrene-butadine latexes; (c) an antimicrobial additive incorporated in said binding agent, said antimicrobial additive being non-crosslinked with said binding agent and forming reservoirs which reside in colloidal suspension within the amorphous zones of said binding agent and from which said antimicrobial additive migrates to the surface of said paper until the reservoir is exhausted; (d) fillers selected from the group including aluminum silicates, titanium dioxide, calcium carbonates, zinc oxides, zinc sulfides, hydrated aluminum talc, calcium sulfate, and barium sulfate; (e) said slurry, binding agents, additives and fillers being subjected to a paper-making process which renders a finished product having the characteristics of substantial density, air impermeability, and smoothness.
Claim 2
Dependent Claim
167 words
An antimicrobial paper for packaging surgical supplies and other goods to be maintained in a sterile condition, said paper comprising: (a) a slurry of paper forming fibers prepared according to a wetlaid process; (b) a polymeric binding agent incorporated in said slurry, said binding agent being selected from the group containing acrylics, polyvinyl acetates, vinyl acetate-ethylenes, polyvinyl chlorides, and styrene-butadine latexes; (c) an antimicrobial additive incorporated in said binding agent, said antimicrobial additive being non-crosslinked with said binding agent and forming reservoirs which reside in colloidal suspension within the amorphous zones of said binding agent and from which said antimicrobial additive migrates to the surface of said paper until the reservoir is exhausted; (d) fillers selected from the group including aluminum silicates, titanium dioxide, calcium carbonates, zinc oxides, zinc sulfides, hydrated aluminum talc, calcium sulfate, and barium sulfate; (e) said slurry, binding agents, additives and fillers being subjected to a paper-making process which renders a finished product having the characteristics of substantial density, air impermeability, and smoothness.
Claim 3
Dependent Claim
31 words
An antimicrobial paper according to claim 1, wherein said antimicrobial additive is selected from the group consisting of compounds containing halogenated aromatic nitriles; a salt of imazalil sulphate; 3,5,3',4'-tetrachlorosalicylanilide; and dichlorophene.
Claim 4
Dependent Claim
21 words
An antimicrobial paper according to claim 2 wherein said antimicrobial additive comprises a combination of two or more of said compounds.
Claim 5
Dependent Claim
138 words
An antimicrobial paper for packaging surgical supplies and other goods to be maintained in a sterile condition, said paper comprising the combination of: (a) paper forming fibers; (b) a polymeric binding agent selected from the group containing acrylics, polyvinyl acetates, vinyl acetate-ethylenes, polyvinyl chlorides, and styrene-butadine latexes; (c) said binding agent including an antimicrobial additive incorporated therein, said antimicrobial additive being non-crosslinked with said binding agent and forming reservoirs which reside in colloidal suspension within the amorphous zones of said binding agent and from which said antimicrobial additive migrates to the surface of said paper until the reservoir is exhausted; (d) fillers selected from the group including aluminum silicates, titanium dioxide, calcium carbonates, zinc oxides, zinc sulfides, hydrated aluminum talc, calcium sulfate, and barium sulfate; (e) said combination having the characteristics of substantial density, air impermeability, and smoothness.
Claim 6
Dependent Claim
138 words
An antimicrobial paper for packaging surgical supplies and other goods to be maintained in a sterile condition, said paper comprising the combination of: (a) paper forming fibers; (b) a polymeric binding agent selected from the group containing acrylics, polyvinyl acetates, vinyl acetate-ethylenes, polyvinyl chlorides, and styrene-butadine latexes; (c) said binding agent including an antimicrobial additive incorporated therein, said antimicrobial additive being non-crosslinked with said binding agent and forming reservoirs which reside in colloidal suspension within the amorphous zones of said binding agent and from which said antimicrobial additive migrates to the surface of said paper until the reservoir is exhausted; (d) fillers selected from the group including aluminum silicates, titanium dioxide, calcium carbonates, zinc oxides, zinc sulfides, hydrated aluminum talc, calcium sulfate, and barium sulfate; (e) said combination having the characteristics of substantial density, air impermeability, and smoothness.
Claim 7
Dependent Claim
31 words
An antimicrobial paper according to claim 4, wherein said antimicrobial additive is selected from the group consisting of compounds containing halogenated aromatic nitriles; a salt of imazalil sulphate; 3,5,3',4'-tetrachlorosalicylanilide; and dichlorophene.
Claim 8
Dependent Claim
21 words
An antimicrobial paper according to claim 5 wherein said antimicrobial additive comprises a combination of two or more of said compounds.
References Cited (Backward Citations)
US2833669A
Cited
US2813056A
Cited
US4111922A
Cited
US3959556A
Cited
US4343853A
Cited
US4401712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |