US4155124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burnt ceramic bone implant
Assignee: Kyoto Ceramic Co Ltd
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Filing: 1978-01-26
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Granted: 1979-05-22
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Expires: 1998-01-26
Abstract
Abstract This invention is directed to a burnt ceramics composition of matter for an endosseous implant to be inserted in the bone tissue of a living body. The composition of matter consists of 95-50% of Al 2 O 3 and 5-50% of more than one compound selected from the group consisting of ZrO 2 , La 2 O 3 and Y 2 O 3 .
Inventors
- 👤 Haruyuki Kawahara
- 👤 Masaya Hirabayashi
- 👤 Yoshiteru Hamano
- 👤 Yoshimasa Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:58
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/02; A61L27/10; A61L27/105; A61L27/12; A61F; A61F2310/00; A61F2310/00005; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A ceramic bone implant comprising: (a) 80-90 wt. % Al 2 O 3 ; and (b) 10-20 wt. % of a compound selected from the group consisting of La 2 O 3 , Y 2 O 3 , and mixtures thereof.
Claim 2
Dependent Claim
41 words
A ceramic bone implant comprising: (a) 80-90 wt. % Al 2 O 3 ; and (b) 10-20 wt. % of a compound selected from the group consisting of La 2 O 3 , Y 2 O 3 , and mixtures thereof.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |