US4802847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental implant
Assignee: Individual
•
Filing: 1987-09-16
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Granted: 1989-02-07
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Expires: 2007-09-16
Abstract
Abstract A dental implant includes a wavy or tortuous body. The body with a tortuous cross section has ridges extending from an upper end to a lower end. The dental implant also has a head supported on the upper end of the body and adapted to fit into an artificial tooth.
Inventors
- 👤 Shigeru Komatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:33
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0019
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A dental implant comprising: a body having a tortuous cross section with ridges extending from an upper end to a lower end, and a plurality of pointed leg portions at the lower end; and a head supported on the upper end of the body and adapted to receive an artificial tooth, said head having a generally elliptical transverse cross section with its major axis extending substantially normal to a central plane of said body and a positioning step formed at the lower peripheral portion thereof for engaging the bottom portion of an artificial tooth.
Claim 2
Dependent Claim
94 words
A dental implant comprising: a body having a tortuous cross section with ridges extending from an upper end to a lower end, and a plurality of pointed leg portions at the lower end; and a head supported on the upper end of the body and adapted to receive an artificial tooth, said head having a generally elliptical transverse cross section with its major axis extending substantially normal to a central plane of said body and a positioning step formed at the lower peripheral portion thereof for engaging the bottom portion of an artificial tooth.
Claim 3
Dependent Claim
21 words
A dental implant according to claim 1, wherein said tortuous cross section is continuous transversely to the ridges of said body.
Claim 4
Dependent Claim
24 words
A dental implant according to claim 1, wherein said tortuous cross section has a width in the range of from 1 to 2 mm.
Claim 5
Dependent Claim
31 words
A dental implant according to claim 1, wherein said tortuous cross section has a plurality of crests, adjacent ones of which are spaced a distance ranging from 2 to 3 mm.
Claim 6
Dependent Claim
30 words
A dental implant according to claim 1, wherein said tortuous cross section has a width which is progressively smaller from an upper portion to a lower portion of said body.
Claim 7
Dependent Claim
22 words
A dental implant according to claim 1, wherein said tortuous cross section has a plurality of crests each having a curved shape.
Claim 8
Dependent Claim
18 words
A dental implant according to claim 1, wherein the dental implant is made of a pure rare metal.
Claim 9
Dependent Claim
14 words
A dental implant according to claim 7, wherein said rare metal is pure titanium.
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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |