US5238749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antimicrobial coating process and product
Assignee: RICURA Corp
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Filing: 1991-03-14
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Granted: 1993-08-24
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Expires: 2011-03-14
Abstract
Abstract An improved antimicrobial coated product and a method for coating substrates, the product of which is capable of withstanding high impact, is not subject to corrosion, is resistant to germ retention and transfer, and thus is extremely well suited for the containment of toxic, hazardous, corrosive, and bacteria-laden wastes as well as for products which are resistant to attack from fungus, positive and negative bacteria, yeast infections and contaminations, and viruses, as well as resistant to attack from corrosion, corrosive chemicals, caustic chemicals, and radiation. The substrate is coated with a thermoplastic material incorporating an antimicrobial agent by electrostatic, fluidized bed or flame spraying techniques. Alternatively, the substrate may be coated with a combination of a thermosetting resin and a thermoplastic material, either or both incorporating an antimicrobial agent, all of which can be cured in place.
Inventors
- 👤 Glenn F. Cueman
- 👤 Robert S. Watterson, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:39
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/02; B05D1/04; B05D1/06; B05D7/00; B05D7/50; B05D7/52; B05D7/54; B05D7/542; C; C09; C09D; C09D5/00; C09D5/08; C09D5/16; C09D5/1693; B05D2202/00; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31678; Y10T428/31692; Y10T428/31855
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
An antimicrobial laminated article, comprising: a substrate selected from the group consisting of non-ferrous and ferrous metals, glass, porcelain, concrete, refractory and other high silica materials, plastics and thermoplastics; a coating of thermoplastic material containing an effective antimicrobial amount of 5-chloro-2,4 dichloro-phenoxy) phenol which exhibits controlled migration through said coating to said substrate surface when an imbalance of vapor pressure of said 5-chloro-2-(2,4-dichloro-phenoxy) phenol within said coating demands equalization; said coating material being bonded to said substrate, and having a high degree of impermeability.
Claim 2
Dependent Claim
84 words
An antimicrobial laminated article, comprising: a substrate selected from the group consisting of non-ferrous and ferrous metals, glass, porcelain, concrete, refractory and other high silica materials, plastics and thermoplastics; a coating of thermoplastic material containing an effective antimicrobial amount of 5-chloro-2,4 dichloro-phenoxy) phenol which exhibits controlled migration through said coating to said substrate surface when an imbalance of vapor pressure of said 5-chloro-2-(2,4-dichloro-phenoxy) phenol within said coating demands equalization; said coating material being bonded to said substrate, and having a high degree of impermeability.
Claim 3
Dependent Claim
25 words
An antimicrobial coated product according to claim 1, wherein said 5-chloro-2-(2,4 dichloro-phenoxy) phenol comprises from 1 to 10 percent by weight of the thermoplastic powder.
Claim 4
Dependent Claim
64 words
An antimicrobial anti-fouling coated article, comprising: a substrate; a coating of a thermoplastic material containing an effective antimicrobial amount of 5-chloro-2-(2,4 dichloro-phenoxy) phenol which exhibits controlled migration through said coating to said substrate surface when an imbalance of vapor pressure of said 5-chloro-2-(2,4 dichloro-phenoxy) phenol within said coating demands equalization; said coating being bonded to the substrate, and having a high degree of impermeability.
Claim 5
Dependent Claim
64 words
An antimicrobial anti-fouling coated article, comprising: a substrate; a coating of a thermoplastic material containing an effective antimicrobial amount of 5-chloro-2-(2,4 dichloro-phenoxy) phenol which exhibits controlled migration through said coating to said substrate surface when an imbalance of vapor pressure of said 5-chloro-2-(2,4 dichloro-phenoxy) phenol within said coating demands equalization; said coating being bonded to the substrate, and having a high degree of impermeability.
Claim 6
Dependent Claim
38 words
An antimicrobial anti-fouling coated article according to claim 3, said substrate being selected from the group consisting of: boats, buoys, concrete pilings, metal pilings, drilling platforms, undersea pipelines, canal locks and gates, dams, hydroelectric dam intakes, and penstocks.
Claim 7
Dependent Claim
174 words
An antimicrobial coated product made by the process of, sequentially: selecting a substrate that will hold an electrostatic charge; preparing the surface of the substrate; grounding the substrate; electrostatically applying a layer of a positively charged, uncured, powdered thermoplastic material containing an effective antimicrobial amount of an antimicrobial biocidal or biostatic substance which maintains its biocidal properties above 300° F. and migrates through the thermoplastic material to the surface of the thermoplastic on demand to said substrate by electrostatic methods; the antimicrobial biocidal or biostatic substance being selected from the group consisting of 5-chloro-2-(2,4dichlorophenoxy) phenol and polyhexamethylene biguanide hydrochloride which exhibits controlled migration through said coating to said substrate surface when an imbalance of vapor pressure of said 5-chloro-2-(2,4 dichloro-phenoxy) phenol within said coating demands equalization; and thereafter heating the substrate and said coating to a temperature of from 355° to 430° F. and holding the temperature for a period of from 5 to 22 minutes; whereby said coating materials become cured and bonded to the substrate, and develop a high degree of impermeability.
Claim 8
Dependent Claim
174 words
An antimicrobial coated product made by the process of, sequentially: selecting a substrate that will hold an electrostatic charge; preparing the surface of the substrate; grounding the substrate; electrostatically applying a layer of a positively charged, uncured, powdered thermoplastic material containing an effective antimicrobial amount of an antimicrobial biocidal or biostatic substance which maintains its biocidal properties above 300° F. and migrates through the thermoplastic material to the surface of the thermoplastic on demand to said substrate by electrostatic methods; the antimicrobial biocidal or biostatic substance being selected from the group consisting of 5-chloro-2-(2,4dichlorophenoxy) phenol and polyhexamethylene biguanide hydrochloride which exhibits controlled migration through said coating to said substrate surface when an imbalance of vapor pressure of said 5-chloro-2-(2,4 dichloro-phenoxy) phenol within said coating demands equalization; and thereafter heating the substrate and said coating to a temperature of from 355° to 430° F. and holding the temperature for a period of from 5 to 22 minutes; whereby said coating materials become cured and bonded to the substrate, and develop a high degree of impermeability.
Claim 9
Dependent Claim
27 words
An antimicrobial coated product according to claim 5, wherein said antimicrobial biocidal or biostatic substance is from 1 to 10 percent by weight of the thermoplastic powder.
Claim 10
Dependent Claim
36 words
An antimicrobial product according to claim 5, wherein said substrate is a food service, dental, medical, clinical, surgical, sick room, hospital, or personal product which comes into contact with human beings, body parts, or body wastes.
Claim 11
Dependent Claim
46 words
An antimicrobial product according to claim 5, wherein said substrate is selected from the group consisting of: handle, stall separator, toilet seat, bed pan, urinal, surgical instrument, instrument tray, waste container, body fluid container, grease trap, basket, dishwasher, utensil, counter top, chair seat, bench and stool.
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) | 1996-08-23 | 1997-02-22 | 1997-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-23 | 2001-02-22 | 2001-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-23 | 2005-02-22 | 2005-08-24 | $7700.00 | Window Closed / Lapsed |