Patent US4643735A successfully refreshed from Google Patents.
US4643735A
Expired / Lapsed
US
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Repair material for use with bones
Assignee: Hayes Separation Inc
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Filing: 1985-02-27
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Granted: 1987-02-17
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Expires: 2005-02-27
Abstract
Abstract A repair material enabling regrowth of damaged bones is set forth. In the preferred and illustrated embodiment, the repair material is polydivinyl benzene in particulate form. The particles are typically random sizes in a specified range, relatively porous, having a relatively high surface area per unit weight, thereby enabling bone growth supported by such particles.
Inventors
- 👤 William V. Hayes
- 👤 Albert H. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:14
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/56; A61F; A61F2/00; A61F2/02; A61F2/28; A61L27/14; A61L27/16; Y; Y10; Y10S; Y10S525/00; Y10S525/937
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A method of repairing an injured bone in a body comprising the steps of: preparing for implantation particles of substantially pure, randomly cross linked polydivinyl benzene, essentially free of monomer and catalyst; reassembling broken pieces of bone in an aligned fashion; and filling the gaps therein with the particulate polydivinyl benzene which does not trigger the bodies rejection system and which particulate material enables bone knitting such that the particulate material is integrated into the healed bone upon completion of the healing process wherein the material has a surface area of 150 square meters per gram or more and a weight of about 0.3 to 0.45 gm/cc to define a porous particulate material and is an essentially pure linked monomer or polymer having sufficient cross linking to form an irregular shape with pores, the porous particulate material defining an inert matrix enabling bone growth therewith.
Claim 2
Independent Claim
145 words
A method of repairing an injured bone in a body comprising the steps of: preparing for implantation particles of substantially pure, randomly cross linked polydivinyl benzene, essentially free of monomer and catalyst; reassembling broken pieces of bone in an aligned fashion; and filling the gaps therein with the particulate polydivinyl benzene which does not trigger the bodies rejection system and which particulate material enables bone knitting such that the particulate material is integrated into the healed bone upon completion of the healing process wherein the material has a surface area of 150 square meters per gram or more and a weight of about 0.3 to 0.45 gm/cc to define a porous particulate material and is an essentially pure linked monomer or polymer having sufficient cross linking to form an irregular shape with pores, the porous particulate material defining an inert matrix enabling bone growth therewith.
Claim 3
Dependent Claim
42 words
The method of claim 1 wherein the particulate material is inert, does not trigger the human rejection system, is a porous material and is in a range of particles between maximum and minimum specified sizes, and is integrated into the healed bone.
Claim 4
Dependent Claim
57 words
The method of claim 1, wherein the particulate material is ground to a size of 3/16 inches or less, and further wherein the particulate material is used to supply a loss in volume as a result of trauma wherein the bone is broken into pieces and not all the pieces can be recovered for the healing process.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |