US4064566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of adhering bone to a rigid substrate using a graphite fiber reinforced bone cement
Assignee: National Aeronautics and Space Administration
•
Filing: 1976-04-06
•
Granted: 1977-12-27
•
Expires: 1996-04-06
Abstract
Abstract A method of adhering bone to the surface of a rigid substrate such as a metal or resin prosthesis using an improved surgical bone cement. The bone cement has mechanical properties more nearly matched to those of animal bone and thermal curing characteristics which result in less traumatization of body tissues and comprises a dispersion of short high modulus graphite fibers within a bonder composition including polymer dissolved in reactive monomer such as polymethylmethacrylate dissolved in methylmethacrylate monomer.
Inventors
- 👤 with respect to an invention of Fletcher James C. Administrator of the National Aeronautics and Space Administration
- 👤 Albert C. Knoell
- 👤 Hugh G. Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:07
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61L; A61L24/00; A61L24/0047; A61L24/0073; A61L24/0078; A61F2/3094; A61F2/30965; A61F2/46; A61F2002/4631; A61F2310/00; A61F2310/00389; A61F2310/00952; A61L2430/00; A61L2430/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
A method of adhering bone to the surface of a rigid substrate comprising the steps of: applying to the bone and surface a surgical bone cement composition comprising a dispersion of 2 to 12% by weight of high modulus graphite fibers having a diameter from 1 to 50 microns and a length from 0.1 mm to 15 mm within a biocompatible polymer dissolved in a biocompatible reactive monomer; and curing the cement to form an adherent flexural bond.
Claim 2
Independent Claim
78 words
A method of adhering bone to the surface of a rigid substrate comprising the steps of: applying to the bone and surface a surgical bone cement composition comprising a dispersion of 2 to 12% by weight of high modulus graphite fibers having a diameter from 1 to 50 microns and a length from 0.1 mm to 15 mm within a biocompatible polymer dissolved in a biocompatible reactive monomer; and curing the cement to form an adherent flexural bond.
Claim 3
Dependent Claim
14 words
A method according to claim 1 in which the fibers are monofilamentary and non-adhering.
Claim 4
Dependent Claim
44 words
A method according to claim 1 in which the monomer is an acrylic monomer, present from 20 to 40% by weight and the polymer is an acrylic polymer soluble in the monomer and is present in an amount from 50 to 70% by weight.
Claim 5
Dependent Claim
17 words
A method according to claim 3 in which the monomer is methylmethacrylate and the polymer is polymethylmethacrylate.
Claim 6
Dependent Claim
35 words
A method according to claim 4 in which 10% by weight of the graphite fibers are present, 30% by weight of monomer are present and 60% by weight of polymer are present in the composition.
Claim 7
Dependent Claim
34 words
A method according to claim 3 in which the composition further includes from 0.1 to 3% of a biocompatible free radical catalyst and 0 to 1% by weight of an activator for the catalyst.
Claim 8
Dependent Claim
22 words
A method according to claim 1 in which the rigid substrate is a prosthetic device and the bone is living animal bone.
References Cited (Backward Citations)
US3848273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |