Patent US4021915A successfully refreshed from Google Patents.
US4021915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent coloring coat for natural teeth
Assignee: Individual
•
Filing: 1974-08-13
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Granted: 1977-05-10
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Expires: 1994-08-13
Abstract
Abstract The method of changing the entire buccal surface area of a tooth, which comprises applying a layer of glue to the entire buccal area of the tooth and thereafter blowing powdered particles having the desired color, on the buccal surface, said glue being sufficiently tenacious to permanently lock said particles to the glue, and said particles having a hardness approaching that tooth enamel.
Inventors
- 👤 Harry Ernest Rubens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:58
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/20; A61K; A61K6/00; A61K6/70; A61K6/78; A61K6/80; A61K6/884
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A method of restoring a discolored surface of a natural tooth to its original color, which comprises applying a layer of glue to the entire buccal surface of the tooth, and applying to said glued surface immediately thereafter, by blowing, a thin layer of dry powdered colored particles, at ambient temperatures, having a thickness not substantially greater than the thickness of a single particle, forming an entirely new surface over the buccal area in the original color of the tooth, said glue characterized by being sufficient tenacious to adhere to both the tooth and the powdered particles and to resist removal except by wear of the powdered particles, resistant to mouth liquids, non-toxic, being a liquid when applied, whereby the glue will set immediately upon contact with the powdered particles, to limit the thickness of the layer of particles to a single particle thickness on the surface of the glue.
Claim 2
Independent Claim
150 words
A method of restoring a discolored surface of a natural tooth to its original color, which comprises applying a layer of glue to the entire buccal surface of the tooth, and applying to said glued surface immediately thereafter, by blowing, a thin layer of dry powdered colored particles, at ambient temperatures, having a thickness not substantially greater than the thickness of a single particle, forming an entirely new surface over the buccal area in the original color of the tooth, said glue characterized by being sufficient tenacious to adhere to both the tooth and the powdered particles and to resist removal except by wear of the powdered particles, resistant to mouth liquids, non-toxic, being a liquid when applied, whereby the glue will set immediately upon contact with the powdered particles, to limit the thickness of the layer of particles to a single particle thickness on the surface of the glue.
References Cited (Backward Citations)
US1779850A
Cited
US2000285A
Cited
US3413723A
Cited
US3250002A
Cited
US3423828A
Cited
US3518762A
Cited
US3663501A
Cited
US3792531A
Cited
US3801344A
Cited
US3730763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |