US4447208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental polisher
Assignee: Shofu Inc
•
Filing: 1983-04-11
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Granted: 1984-05-08
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Expires: 2003-04-11
Abstract
Abstract An improved dental polishing tool, which is attached to a rotating mandrel and used for polishing a tooth or teeth, and which is soft and resilient and can polish the tooth or teeth readily and safely without injuring gingiva and mucous membrane.
Inventors
- 👤 Masakatsu Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:23
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/06; B; B24; B24D; B24D13/00; B24D13/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
68 words
A dental polisher, comprising a resilient, flexible body made of rubber or synthetic resin, and a rotating shaft coupled to said body, said body having a first polyurethane layer deposited on the surface of said body, a second epoxy adhesive layer deposited on said first layer, abrasive particles scattered on said second layer and a third adhesive layer deposited on said second layer and over said abrasive particles.
Claim 2
Dependent Claim
68 words
A dental polisher, comprising a resilient, flexible body made of rubber or synthetic resin, and a rotating shaft coupled to said body, said body having a first polyurethane layer deposited on the surface of said body, a second epoxy adhesive layer deposited on said first layer, abrasive particles scattered on said second layer and a third adhesive layer deposited on said second layer and over said abrasive particles.
Claim 3
Dependent Claim
16 words
A dental polisher, according to claim 1, wherein said body and said shaft are coupled detachably.
Claim 4
Dependent Claim
40 words
A dental polisher, according to claim 1, wherein said body is composed of a flat disc portion and a central boss portion coupled to said shaft, and said disc portion is secured to said boss portion through an adhesive agent.
Claim 5
Dependent Claim
40 words
A dental polisher, according to claim 2, wherein said body is composed of a flat disc portion and a central boss portion coupled to said shaft, and said disc portion is secured to said boss portion through an adhesive agent.
Claim 6
Dependent Claim
17 words
A dental polisher according to claim 1 wherein said third adhesive layer is a dilute epoxy resin.
Claim 7
Dependent Claim
17 words
A dental polisher according to claim 5 wherein said abrasive particles are alundum containing principally aluminum oxide.
References Cited (Backward Citations)
US3858368A
Cited
US4055897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |