US4867988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dentifrice containing microencapsulated oxygen
Assignee: Production Previews Inc
•
Filing: 1987-04-08
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Granted: 1989-09-19
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Expires: 2007-04-08
Abstract
Abstract A stable oxygen-containing dentifrice in powder, paste or liquid form which contains a carrier and evenly dispersed therethrough a multiplicity of microencapsulated droplets of an oxygen releasing agent such as hydrogen peroxide. The walls of the microcapsules are rupturable upon mechanical manipulation of the dentifrice as it occurs during the toothbrushing action for releasing the oxygen-containing agent.
Inventors
- 👤 Milton P. Chernack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:45
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/02; A61K8/11; A61K8/18; A61K8/19; A61K8/22; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
141 words
A stable oxygen-containing dentifrice comprising as a carrier a toothpaste containing an effective amount of a base to decompose hydrogen peroxide into water and oxygen; and dispersed there throughout a multiplicity of microencapsulated particles of hydrogen peroxide as an oxygen releasing agent, the walls of said microcapsules being rupturable upon mechanical manipulation for releasing said agent; said microcapsules being formed by a wall-forming material selected from the group consisting of dextrin, gelatin, gum arabic, casein, paraffin wax, natural waves, acrylic resin, styrene-maleic acid, polyamide, polyethylene, polyethylene-ethyl cellulose mixtures, polyurethanes, polyesters, acetal homopolymers and copolymers, epoxy resins, cellulose acetophthalate and polypropylene; said microcapsules having a diameter of from about 1 to about 1,000 microns; and the wall thickness of said microcapsules being sufficiently thin to allow rupture by toothbrush action on the toothpaste and sufficiently thick to withstand packing of the composition.
Claim 2
Dependent Claim
141 words
A stable oxygen-containing dentifrice comprising as a carrier a toothpaste containing an effective amount of a base to decompose hydrogen peroxide into water and oxygen; and dispersed there throughout a multiplicity of microencapsulated particles of hydrogen peroxide as an oxygen releasing agent, the walls of said microcapsules being rupturable upon mechanical manipulation for releasing said agent; said microcapsules being formed by a wall-forming material selected from the group consisting of dextrin, gelatin, gum arabic, casein, paraffin wax, natural waves, acrylic resin, styrene-maleic acid, polyamide, polyethylene, polyethylene-ethyl cellulose mixtures, polyurethanes, polyesters, acetal homopolymers and copolymers, epoxy resins, cellulose acetophthalate and polypropylene; said microcapsules having a diameter of from about 1 to about 1,000 microns; and the wall thickness of said microcapsules being sufficiently thin to allow rupture by toothbrush action on the toothpaste and sufficiently thick to withstand packing of the composition.
Claim 3
Dependent Claim
15 words
The composition of claim 1, wherein the diameter of the microcapsules is below 200 microns.
Claim 4
Dependent Claim
19 words
The composition of claim 1, wherein the diameter of the microcapsules is between about 1 to about 100 microns.
Claim 5
Dependent Claim
19 words
The composition of claim 1, wherein the diameter of the microcapsules is from about 5 to about 50 microns.
Claim 6
Dependent Claim
18 words
The composition of claim 1, wherein the microcapsules additionally contain a stabilizer for stabilizing the oxygen releasing agent.
Claim 7
Dependent Claim
13 words
The composition of claim 1, wherein the carrier additionally comprises a polishing agent.
Claim 8
Dependent Claim
12 words
The composition of claim 1, wherein the carrier additionally comprises a stabilizer.
Claim 9
Dependent Claim
13 words
The composition of claim 1, wherein the carrier additionally comprises a cleansing agent.
Claim 10
Dependent Claim
12 words
The composition of claim 1, wherein the carrier additionally comprises an antiseptic.
Claim 11
Dependent Claim
11 words
The composition of claim 1, wherein the base is sodium bicarbonate.
Claim 12
Dependent Claim
12 words
The composition of claim 1, wherein the carrier contains a coloring agent.
Claim 13
Dependent Claim
15 words
The composition of claim 1, wherein the microcapsules are substantially evenly dispersed throughout the carrier.
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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) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |