US4113500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered apatite body
Assignee: Pentax Corp
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Filing: 1977-06-02
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Granted: 1978-09-12
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Expires: 1997-06-02
Abstract
Abstract A sintered apatite body obtained by molding and sintering an apatite powder, Ca 5 (PO 4 ) 3 OH, containing 0.01 to 20% by weight of (Ca,Mg) 3 (PO 4 ) 2 . The sintered apatite body has high mechanical strength and good affinity with living tissues and cells, and is suitable as medical implant materials such as prosthetic teeth or bones.
Inventors
- 👤 Masatomi Ebihara
- 👤 Masahide Inoue
- 👤 Tsuneo Hidaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:18
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/45; A; A61; A61L; A61L27/00; A61L27/02; A61L27/12; C04; C04B; C04B35/00; C04B35/01; C04B35/447; A61F; A61F2310/00; A61F2310/00005; A61F2310/00179; A61F2310/00293; Y; Y10; Y10S; Y10S623/00; Y10S623/92; Y10S623/923
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
42 words
A sintered apatite body comprising the product obtained by molding and sintering a mixture consisting essentially of an apatite powder, Ca 5 (PO 4 ) 3 OH, and 0.01 to 20% by weight of (Ca, Mg) 3 (PO 4 ) 2 .
Claim 2
Dependent Claim
42 words
A sintered apatite body comprising the product obtained by molding and sintering a mixture consisting essentially of an apatite powder, Ca 5 (PO 4 ) 3 OH, and 0.01 to 20% by weight of (Ca, Mg) 3 (PO 4 ) 2 .
Claim 3
Dependent Claim
14 words
A prosthetic tooth or bone composed of the sintered apatite body of claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |