US4324630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a dental caries preventive coating
Assignee: Individual
•
Filing: 1980-07-31
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Granted: 1982-04-13
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Expires: 2000-07-31
Abstract
Abstract In a discharge space are formed neutral or charged particles of metal, alloy, semiconductor or insulator. The particles thus formed are guided through a duct so that they reach a surface of a tooth and form a caries preventive coating covering the surface of the tooth.
Inventors
- 👤 Toshio Sugita
- 👤 Takanobu Morinushi
- 👤 Shigeharu Hanashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:44
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003; A61C5/00; A61C5/70; A61C5/77; C; C23; C23C; C23C14/00; C23C14/22; C23C14/34; C23C14/35; C23C14/352
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
Method for forming a dental caries preventive coating by ion sputtering consisting of; forming neutral or charged particles of metal, alloy, semiconductor or insulator in a discharge space; and guiding said neutral or charged particles through a duct so that said particles reach selectively an limited portion of a tooth surface and form a coating covering said portion of the surface.
Claim 2
Dependent Claim
61 words
Method for forming a dental caries preventive coating by ion sputtering consisting of; forming neutral or charged particles of metal, alloy, semiconductor or insulator in a discharge space; and guiding said neutral or charged particles through a duct so that said particles reach selectively an limited portion of a tooth surface and form a coating covering said portion of the surface.
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) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |