Patent US4792918A successfully refreshed from Google Patents.
Patent US4690642A successfully refreshed from Google Patents.
US4690642A
Expired / Lapsed
US
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Dental polishing strip
Assignee: GC Corp
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Filing: 1985-09-19
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Granted: 1987-09-01
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Expires: 2005-09-19
Abstract
Abstract A dental polishing strip includes a substrate formed of a shape-memory alloy which is not harmful in the human mouth and is restored to the stored shape at a temperature of no lower than 40° C. for sterilization in dental clinics. The polishing strip is provided with a number of small holes, files, abrasive grains, or a combination thereof to form a polishing surface.
Inventors
- 👤 Ikuo Kyotani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:44
CPC Classifications
B; B24; B24D; B24D15/00; A; A61; A61C; A61C3/00; A61C3/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
69 words
A dental polishing strip comprising: (a) a substrate formed of a shape-memory alloy selected so that, after deformation by contact with the teeth during use, said substrate returns to its original shape upon being heated to a temperature at least slightly higher than the temperature of human mouths and (b) a polishing surface on said substrate for polishing the proximal surfaces of teeth or fillings in the proximal cavity.
Claim 2
Dependent Claim
69 words
A dental polishing strip comprising: (a) a substrate formed of a shape-memory alloy selected so that, after deformation by contact with the teeth during use, said substrate returns to its original shape upon being heated to a temperature at least slightly higher than the temperature of human mouths and (b) a polishing surface on said substrate for polishing the proximal surfaces of teeth or fillings in the proximal cavity.
Claim 3
Dependent Claim
48 words
A dental polishing strip as recited in claim 1 wherein said shape-memory alloy is selected so that, after deformation by contact with the teeth during use, said substrate returns to its original shape upon being heated to a temperature in the range of 40° C. to 250° C.
Claim 4
Dependent Claim
30 words
A dental polishing strip as recited in claim 1 wherein said shape-memory alloy is selected from the group consisting of Ti-Ni shape-memory alloy, Cu-Zn-Al shape-memory alloy, and Fe-Mn shape-memory alloy.
Claim 5
Dependent Claim
18 words
A dental polishing strip as recited in claim 1 wherein said polishing surface is formed like a file.
Claim 6
Dependent Claim
22 words
A dental polishing strip as recited in claim 1 wherein said polishing surface is formed on one side only of said substrate.
Claim 7
Dependent Claim
21 words
A dental polishing strip as recited in claim 1 wherein said polishing surface is formed on both sides of said substrate.
Claim 8
Dependent Claim
23 words
A dental polishing strip as recited in claim 1 wherein said polishing surface is formed from polishing adhesive grains mounted on said substrate.
Claim 9
Dependent Claim
43 words
A dental polishing strip as recited in claim 7 wherein said polishing adhesive grains are selected from the group consisting of aluminum oxide, diamond, carborundum, cubic boron nitride, and ceramic materials based on TiC, ZrO 2 , or Si 3 N 4 .
Claim 10
Dependent Claim
22 words
A dental polishing strip as recited in claim 7 wherein said polishing adhesive grains have a grain size of about 7-150 microns.
Claim 11
Dependent Claim
24 words
A dental polishing strip as recited in claim 7 wherein said polishing adhesive grains are mounted on said substrate by means of an adhesive.
Claim 12
Dependent Claim
23 words
A dental polishing strip as recited in claim 7 wherein said polishing adhesive grains are mounted on said substrate by means of electroplating.
Claim 13
Dependent Claim
23 words
A dental polishing strip as recited in claim 7 wherein said polishing adhesive grains are mounted on said substrate by means of brazing.
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) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |