US5292349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical aid endowed with osteotropic activity
Assignee: Individual
•
Filing: 1989-02-14
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Granted: 1994-03-08
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Expires: 2009-02-14
Abstract
Abstract The surgical aid endowed with osteotropic activity comprises a base and a suspended substance constituting the active element dispersed in the base. The active element is constituted by granular, ceramic hydroxy-apatite, and the base is gelatine of pharmacologic grade in a pure state, to which glycerol is possibly added. The aid is used in anhydrous phase, and as thin sheets and filaments, the flexibility of which increases with increasing percentage of glycerol in the base.
Inventors
- 👤 Giancarlo Foresti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:58
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/46; A61L2/00; A61L2/02; A61L2/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
A surgical aid endowed with an osteotropic activity, characterized in that it comprises a base and a suspended substance, which constitutes the active element, with said base being constituted by gelatine of pharmacologic grade, in a pure state, and the suspended matter being constituted by ceramic hydroxy-apatite dispersed in the base, said surgical aid containing glycerol and being prepared in two successive phases, said two phases comprising an intermediate hydrate phase and a final anhydrous phase, with said hydrate phase substantially comprising: ______________________________________
hydroxy-apatite 61.35%
gelatine 13.56%
glycerol 12.65%
water 12.44%
______________________________________ and said anhydrous phase substantially comprising: ______________________________________
hydroxy-apatite 70.00%
gelatine 15.05%
glycerol 14.04%
water 0.91%.
______________________________________
Claim 2
Dependent Claim
108 words
A surgical aid endowed with an osteotropic activity, characterized in that it comprises a base and a suspended substance, which constitutes the active element, with said base being constituted by gelatine of pharmacologic grade, in a pure state, and the suspended matter being constituted by ceramic hydroxy-apatite dispersed in the base, said surgical aid containing glycerol and being prepared in two successive phases, said two phases comprising an intermediate hydrate phase and a final anhydrous phase, with said hydrate phase substantially comprising: ______________________________________
hydroxy-apatite 61.35%
gelatine 13.56%
glycerol 12.65%
water 12.44%
______________________________________ and said anhydrous phase substantially comprising: ______________________________________
hydroxy-apatite 70.00%
gelatine 15.05%
glycerol 14.04%
water 0.91%.
______________________________________
Claim 3
Dependent Claim
26 words
A surgical aid according to claim 1, characterized in that the percentage of glycerol is variable relative to the gelatine percentage, by a value of ±4%.
Claim 4
Dependent Claim
28 words
A surgical aid according to claim 1, characterized in that hydroxy-apatite is provided as granules, the diameter of which is within the range of 0.5 to 1.8 mm.
Claim 5
Dependent Claim
20 words
A surgical aid according to claim 1, characterized in that in the anhydrous state it is both elastic and flexible.
Claim 6
Dependent Claim
75 words
A surgical aid endowed with an osteotropic activity, characterized in that it comprises a base and a suspended substance, which constitutes the active element, with said base being constituted by gelatine of pharmacologic grade, in a pure state, and the suspended matter being constituted by ceramic hydroxy-apatite dispersed in the base, said surgical aid containing glycerol and being provided in an anhydrous phase substantially comprising: ______________________________________
hydroxy-apatite 70.00%
gelatine 15.05%
glycerol 14.04%
water 0.91%.
______________________________________
Claim 7
Dependent Claim
75 words
A surgical aid endowed with an osteotropic activity, characterized in that it comprises a base and a suspended substance, which constitutes the active element, with said base being constituted by gelatine of pharmacologic grade, in a pure state, and the suspended matter being constituted by ceramic hydroxy-apatite dispersed in the base, said surgical aid containing glycerol and being provided in an anhydrous phase substantially comprising: ______________________________________
hydroxy-apatite 70.00%
gelatine 15.05%
glycerol 14.04%
water 0.91%.
______________________________________
Claim 8
Dependent Claim
26 words
A surgical aid according to claim 5, characterized in that the percentage of glycerol is variable relative to the gelatine percentage, by a value of ±4%.
Claim 9
Dependent Claim
28 words
A surgical aid according to claim 5, characterized in that hydroxy-apatite is provided as granules, the diameter of which is within the range of 0.5 to 1.8 mm.
Claim 10
Dependent Claim
20 words
A surgical aid according to claim 5, characterized in that in the anhydrous state it is both elastic and flexible.
References Cited (Backward Citations)
DE2756256A1
Cited
US4803075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-07 | 1997-09-06 | 1998-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-07 | 2001-09-06 | 2002-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-07 | 2005-09-06 | 2006-03-08 | $7700.00 | Window Closed / Lapsed |