US5720941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric particles for dental applications
Assignee: Gillette Canada Inc
•
Filing: 1995-06-06
•
Granted: 1998-02-24
•
Expires: 2015-06-06
Abstract
Abstract An anti-microbial composition includes particles having an outer surface onto which an anti-microbial agent has been adsorbed. The particles can be used, for example, for coating the bristles of toothbrushes.
Inventors
- 👤 Jean L. Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:35
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/02; A61K8/0241; A61K8/18; A61K8/30; A61K8/40; A61K8/43; A61K8/72; A61K8/81; A61K8/8105; A61K8/8117; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/56
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
65 words
An anti-microbial composition, comprising solid particles having an outer surface onto which an anti-microbial agent has been adsorbed, wherein said anti-microbial agent is present in said composition only on said outer surface, said anti-microbial agent is ionically charged, said outer surface has an opposite ionic charge, and said anti-microbial agent is adsorbed on the surface of said particle at least in part through electrostatic interaction.
Claim 2
Dependent Claim
65 words
An anti-microbial composition, comprising solid particles having an outer surface onto which an anti-microbial agent has been adsorbed, wherein said anti-microbial agent is present in said composition only on said outer surface, said anti-microbial agent is ionically charged, said outer surface has an opposite ionic charge, and said anti-microbial agent is adsorbed on the surface of said particle at least in part through electrostatic interaction.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein said anti-microbial agent comprises chlorhexidine.
Claim 4
Dependent Claim
10 words
The composition of claim 2 wherein said particles comprise polystyrene.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein said particles are between 0.01 μ and 10 μ in diameter.
Claim 6
Dependent Claim
17 words
The composition of claim 4 wherein said particles are between 0.05 μ and 1 μ in diameter.
Claim 7
Dependent Claim
13 words
The composition of claim 1 wherein said outer surface is negatively charged layer.
Claim 8
Dependent Claim
11 words
The composition of claim 1 wherein said particles comprise organic polymers.
Claim 9
Dependent Claim
21 words
An anti-microbial composition, comprising polymeric microspheres having negatively charged outer surfaces on which a positively charged anti-microbial agent has been adsorbed.
Claim 10
Dependent Claim
21 words
An anti-microbial composition, comprising polymeric microspheres having negatively charged outer surfaces on which a positively charged anti-microbial agent has been adsorbed.
Claim 11
Dependent Claim
12 words
The anti-microbial composition of claim 8 wherein said anti-microbial agent comprises chlorhexidine.
Claim 12
Dependent Claim
11 words
The anti-microbial composition of claim 8 wherein said microspheres comprises polystyrene.
Claim 13
Dependent Claim
19 words
The anti-microbial composition of claim 8 wherein said microspheres have a diameter of between 0.01 μ and 10 μ.
Claim 14
Dependent Claim
33 words
An anti-microbial composition comprising particles having a negatively charged outer surface onto which a positively charged anti-microbial agent has been adsorbed, said particles having a diameter of between 0.01 μ and 10 μ.
Claim 15
Dependent Claim
33 words
An anti-microbial composition comprising particles having a negatively charged outer surface onto which a positively charged anti-microbial agent has been adsorbed, said particles having a diameter of between 0.01 μ and 10 μ.
Claim 16
Dependent Claim
11 words
The composition of claim 12 wherein said anti-microbial agent comprises chlorhexidine.
Claim 17
Dependent Claim
10 words
The composition of claim 13 wherein said particles comprise polystyrene.
Claim 18
Dependent Claim
17 words
The composition of claim 12 wherein said particles are between 0.05 μ and 1 μ in diameter.
Claim 19
Dependent Claim
10 words
The composition of claim 12 wherein said particles comprise polystyrene.
Claim 20
Dependent Claim
11 words
The composition of claim 12 wherein said particles comprise organic polymers.
Claim 21
Dependent Claim
39 words
The composition of claim 12 wherein said anti-microbial agent is ionically charged, said outer surface has an opposite ionic charge, and said anti-microbial agent is absorbed on the surface of said particle at least in part through electrostatic interaction.
Claim 22
Independent Claim
74 words
A method of inhibiting bacteria in the mouth, comprising adsorbing an anti-microbial agent onto the outer surface of a polymeric particle, wherein said outer surface is ionically charged and said anti-microbial agent has an ionic charge that is the opposite of the ionic charge of said outer surface; and placing said polymer particle with said anti-microbial agent adsorbed onto its outer surface into the mouth of a person to inhibit bacteria in said mouth.
Claim 23
Independent Claim
74 words
A method of inhibiting bacteria in the mouth, comprising adsorbing an anti-microbial agent onto the outer surface of a polymeric particle, wherein said outer surface is ionically charged and said anti-microbial agent has an ionic charge that is the opposite of the ionic charge of said outer surface; and placing said polymer particle with said anti-microbial agent adsorbed onto its outer surface into the mouth of a person to inhibit bacteria in said mouth.
Claim 24
Dependent Claim
11 words
The method of claim 19 wherein said anti-microbial agent is chlorhexidine.
Claim 25
Dependent Claim
11 words
The method of claim 19 wherein said particles are polystyrene microspheres.
Claim 26
Dependent Claim
16 words
The method of claim 19 wherein said anti-microbial agent is present only on said outer surface.
Claim 27
Dependent Claim
17 words
The method of claim 19 wherein said particle has a diameter between 0.05 μ and 1 μ.
Claim 28
Dependent Claim
11 words
The method of claim 19 wherein said anti-microbial agent is chlorhexidine.
Claim 29
Dependent Claim
11 words
The method of claim 19 wherein said particles are polystyrene microspheres.
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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) | 2001-02-23 | 2001-08-25 | 2002-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-23 | 2005-08-25 | 2006-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-23 | 2009-08-25 | 2010-02-24 | $7700.00 | Window Closed / Lapsed |