US5082803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing bone prosthesis
Assignee: Pentax Corp
•
Filing: 1990-09-21
•
Granted: 1992-01-21
•
Expires: 2010-09-21
Abstract
Abstract A process for producing a bone prosthesis is disclosed, which process comprises the steps of: (a) adding granular ceramics to pullulan; and (b) treating the granular ceramics and the pullulan with high-temperature and high-pressure steam.
Inventors
- 👤 Masaya Sumita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61K; A61K6/00; A61K6/15; A61K6/17; A61K6/50; A61K6/58; A61K6/70; A61K6/71; A61K6/74; A61K6/75; A61K6/80; A61K6/802; A61K6/818; A61K6/884; A61K6/898; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/46; A61F2/30; A61F2/3094
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
31 words
A process for producing a bone prosthesis comprising the steps of: (a) adding granular ceramics to pullulan; and (b) treating said granular ceramics and said pullulan with high-temperature and high-pressure steam.
Claim 2
Dependent Claim
31 words
A process for producing a bone prosthesis comprising the steps of: (a) adding granular ceramics to pullulan; and (b) treating said granular ceramics and said pullulan with high-temperature and high-pressure steam.
Claim 3
Dependent Claim
34 words
A process as claimed in claim 1, said process comprising the steps of: (a) mixing granular ceramics with powdered pullulan to form a mixture; and (b) treating said mixture with high-temperature and high-pressure steam.
Claim 4
Dependent Claim
15 words
A process as claimed in claim 1, wherein said ceramics is a calcium phosphate ceramics.
Claim 5
Dependent Claim
26 words
A process as claimed in claim 1, wherein said ceramics is ceramics comprising at least one of hydroxyapatite, fluorapatite, α-tricalcium phosphate, β-tricalcium phosphate, and tetracalcium phosphate.
Claim 6
Dependent Claim
25 words
A process as claimed in claim 1, wherein a mixing ratio of said granular ceramics to said pullulan is from 0.1 to 10 by weight.
Claim 7
Dependent Claim
26 words
A process as claimed in claim 1, wherein said step of treating said mixture with high-temperature and highpressure steam is carried out by using an autoclave.
References Cited (Backward Citations)
US4080213A
Cited
US4938938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |