Patent US3094812A successfully refreshed from Google Patents.
US5141290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toothbrush
Assignee: Hamivreshet Brush Factory
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Filing: 1991-04-29
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Granted: 1992-08-25
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Expires: 2011-04-29
Abstract
Abstract The invention provides a toothbrush of the type having a plastic head and bristles terminating in the head and extending therefrom in an array, the toothbrush comprising an antibacterial composition embedded in pores created in the plastic head, which antibacterial composition is slowly releasable from the toothbrush into the buccal cavity during repeated use thereof during the life of the brush.
Inventors
- 👤 Omri Mairon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:08
CPC Classifications
A; A46; A46B; A46B11/00; A46B2200/00; A46B2200/10; A46B2200/1066
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
A process for producing a toothbrush of the type having a plastic head and bristles terminating in said head and extending therefrom in an array, said toothbrush being characterized by having an antibacterial composition embedded in pores in said head for slow release therefrom into the buccal cavity during the life of the brush said process comprising immersing said head in a solution comprising a solvent capable of creating pores in said plastic head and an antibacterial compound whereby pores are formed in said head and said solution permeates said pores and then evaporating said solvent thereby leaving the antibacterial compound embedded in said toothbrush head for sustained release therefrom into the buccal cavity of a user during uses thereof.
Claim 2
Dependent Claim
120 words
A process for producing a toothbrush of the type having a plastic head and bristles terminating in said head and extending therefrom in an array, said toothbrush being characterized by having an antibacterial composition embedded in pores in said head for slow release therefrom into the buccal cavity during the life of the brush said process comprising immersing said head in a solution comprising a solvent capable of creating pores in said plastic head and an antibacterial compound whereby pores are formed in said head and said solution permeates said pores and then evaporating said solvent thereby leaving the antibacterial compound embedded in said toothbrush head for sustained release therefrom into the buccal cavity of a user during uses thereof.
Claim 3
Dependent Claim
26 words
A process for producing a toothbrush as claimed in claim 1 wherein said solvent is selected from methylene chloride, acetone, ethylene chloride, methyl acetate and chloroform.
Claim 4
Dependent Claim
17 words
A process for producing a toothbrush as claimed in claim 1 wherein said solvent is methylene chloride.
Claim 5
Dependent Claim
28 words
A process for producing a toothbrush as claimed in claim 1 wherein said solution further comprises a release enhancer selected from ethanol, cyclohexane, isopropanol, pentane or ethyl acetate.
Claim 6
Dependent Claim
22 words
A process for producing a toothbrush as claimed in claim 1 wherein said solution comprises a mixture of methylene chloride and ethanol.
Claim 7
Dependent Claim
28 words
A process for producing a toothbrush as claimed in claim 1 wherein said solution further comprises a humectant selected from glycerine, sorbitol hydrogenate, starch hydrolyzate or polyethylene glycol.
Claim 8
Dependent Claim
22 words
A process for producing a toothbrush as claimed in claim 1 wherein said antibacterial agent is selected from chlorohexidine and cetylpyridinium chloride.
Claim 9
Dependent Claim
21 words
A process for producing a toothbrush as claimed in claim 1 wherein said solution further comprises a hydrophobic polymer or wax.
Claim 10
Dependent Claim
26 words
A process for producing a toothbrush as claimed in claim 8 wherein said hydrophobic polymer is selected from stearic acid, cellulose derivatives, polyethylenes, methacrylic acid polymers.
Claim 11
Dependent Claim
37 words
A process for producing a toothbrush as claimed in claim 6 wherein said hydrophobic polymer or wax is selected from glyceryl stearate, carnauba wax, stearyl alcohol, ethyl cellulose, polyethylene glycol, cellulose acetate and a methacrylic acid polymer.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |