Patent US3574943A successfully refreshed from Google Patents.
US3574943A
Expired / Lapsed
US
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Dental cavity liner and method of restoring carious teeth
Assignee: University of California Berkeley
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Filing: 1969-03-10
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Granted: 1971-04-13
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Expires: 1989-03-10
Abstract
Abstract Concerned is a method of and substance for use in restoring a carious tooth from which the carious material has been removed. The cavity so formed is lined with a layer of a polysiloxane, pressure sensitive, adhesive polymer dissolved in a fluorocarbon and then filled with an amalgam, thus providing a nonleaking repair.
Inventors
- 👤 Marvin M Stark
- 👤 Ronald J Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:28
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/847; A61K6/20; A61K6/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
The step in a method of depositing filling material in a tooth consisting of interposing a layer of a polysiloxane pressure-sensitive adhesive polymer dissolved in a fluorocarbon between the material of said tooth and sail filling material in said tooth.
Claim 2
Dependent Claim
21 words
As a liner for the wall of a tooth cavity, a layer of polysiloxane pressure-sensitive adhesive polymer dissolved in a fluorocarbon.
References Cited (Backward Citations)
US3254411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |