US4356572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biodegradable implant useable as a bone prosthesis
Assignee: LE GUERNOL
•
Filing: 1980-07-08
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Granted: 1982-11-02
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Expires: 2000-07-08
Abstract
Abstract A biodegradable bone prosthesis or implant is made of a coherent material comprising calcium carbonate in crystalline form. The prosthesis or implant is in the form of a filler or replacement part for bone substance. It can also be in the form of a pin or screw.
Inventors
- 👤 Genevieve Guillemin
- 👤 Jean-Louis Patat
- 👤 Alain Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:06
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/58; A61F; A61F2/00; A61F2/02; A61F2/28; A61L27/02; A61L27/025; A61L27/36; A61L27/3604; A61L27/3641; A61L27/3645; A61L27/365; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30084; A61F2210/00; A61F2210/0004; A61F2310/00; A61F2310/00005; A61F2310/00341
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
29 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a filler part for bone substance.
Claim 2
Dependent Claim
29 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a filler part for bone substance.
Claim 3
Dependent Claim
29 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a replacement part for bone substance.
Claim 4
Dependent Claim
29 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a replacement part for bone substance.
Claim 5
Dependent Claim
25 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a screw.
Claim 6
Dependent Claim
25 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a screw.
Claim 7
Dependent Claim
25 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a pin.
Claim 8
Dependent Claim
25 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a pin.
Claim 9
Dependent Claim
25 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of fixation corners.
Claim 10
Dependent Claim
25 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of fixation corners.
Claim 11
Dependent Claim
38 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a partially hollow articular prosthesis, the hollow part of which is filled with said material.
Claim 12
Dependent Claim
38 words
A biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form and being in the form of a partially hollow articular prosthesis, the hollow part of which is filled with said material.
Claim 13
Dependent Claim
65 words
The biodegradable bone prosthesis or implant of claims 1, 2, 3, 4, 5 or 6 wherein said material is found inside the hollow parts of a partially hollow nonresorbable endoprosthetic element, the hollow parts being in communication with the outside of said element, said communications being located in an area of contact with the bone substance when the prosthesis or implant is put in place.
Claim 14
Dependent Claim
26 words
The biodegradable bone prosthesis or implant of claims 1, 2, 3, 4, 5 or 6 wherein said material has a porosity ranging from 30 to 80%.
Claim 15
Dependent Claim
20 words
The biodegradable bone prosthesis or implant of claim 8 wherein the diameter of the pores is at least 50 microns.
Claim 16
Dependent Claim
28 words
The biodegradable bone prosthesis or implant of claims 1, 2, 3, 4, 5 or 6 wherein said material is selected from the group consisting of aragonite and calcite.
Claim 17
Dependent Claim
22 words
The biodegradable bone prosthesis or implant of claims 1, 2, 3, 4, 5 or 6 wherein said material is sea urchin spines.
Claim 18
Dependent Claim
15 words
The biodegradable bone prosthesis or implant of claim 11 wherein said sea urchin is Citaris.
Claim 19
Dependent Claim
35 words
A process for filling in or replacing the loss of a bony substance or bone resections comprising implanting a biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form.
Claim 20
Dependent Claim
35 words
A process for filling in or replacing the loss of a bony substance or bone resections comprising implanting a biodegradable bone prosthesis or implant made of a coherent material comprising calcium carbonate in crystalline form.
Claim 21
Dependent Claim
12 words
The process of claim 13 wherein said material has a porous structure.
Claim 22
Dependent Claim
16 words
The process of claim 14 wherein the diameter of the pores is at least 50 microns.
Claim 23
Dependent Claim
18 words
The process of claim 13 wherein said material is selected from the group consisting of aragonite and calcite.
Claim 24
Dependent Claim
12 words
The process of claim 13 wherein said material is sea urchin spines.
Claim 25
Dependent Claim
11 words
The process of claim 13 wherein said sea urchin is Citaris.
Claim 26
Dependent Claim
55 words
The process of claim 13 wherein said material is implanted inside the hollow parts of a partially hollow nonresorbable endoprosthetic element, the hollow parts being in communication with the outside of said element, said communications being located in an area of contact with the bone substance when the prosthesis or implant is put in place.
Claim 27
Dependent Claim
19 words
A process of claim 13 wherein said material is in the form of a filler part for bone substance.
Claim 28
Dependent Claim
19 words
The process of claim 13 wherein said material is in the form of a replacement part for bone substance.
Claim 29
Dependent Claim
15 words
The process of claim 13 wherein said material is in the form of a screw.
Claim 30
Dependent Claim
15 words
The process of claim 13 wherein said material is in the form of a pin.
References Cited (Backward Citations)
US3929971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |