Patent US3670076A successfully refreshed from Google Patents.
US3670076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental prophylaxis composition comprising alumina of particular particle size
Assignee: Indiana University Foundation Inc
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Filing: 1970-03-31
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Granted: 1972-06-13
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Expires: 1990-03-31
Abstract
Abstract A mixture of relatively large and relatively small alpha alumina particles (comprising between about 2.5 percent and 10 percent small particle size alumina and balance large particle size alumina) provides a superior abrasive component for a dental prophylaxis paste adapted for infrequent application to the teeth.
Inventors
- 👤 Joseph C Muhler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:22
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
A cleaning and polishing agent, as claimed in claim 1, wherein the component comprises about 2.5-10 percent of the relatively small alumina particles.
Claim 2
Dependent Claim
52 words
A cleaning and polishing agent, as claimed in claim 1, wherein at least about 75 percent of the relatively large particles lie in the range of about 30-53 microns and at least about 75 percent of the relatively small particles lie in the range of up to about 5 microns particle size.
Claim 3
Independent Claim
85 words
A method for cleaning and polishing the oral hard tissues comprising the application thereto of a dental prophylaxis cleaning and polishing agent comprising as its essential component at least about 90 percent by weight of the component of relatively large alumina particles lying preponderantly in the range of about 30-75 microns and a minor amount of relatively small alumina particles lying preponderantly in the range of up to about 15 microns particle size, substantially all of the alumina particles being of the alpha crystalline form.
Claim 4
Dependent Claim
20 words
A method, as claimed in claim 4, wherein the component comprises about 2.5-10 percent of the relatively small alumina particles.
Claim 5
Dependent Claim
49 words
A method, as claimed in claim 4, wherein at least about 75 percent of the relatively large particles lie in the range of about 30-53 microns and at least about 75 percent of the relatively small particles lie in the range of up to about 5 microns particle size.
References Cited (Backward Citations)
FR1559196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |