US4837279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone cement
Assignee: Howmedica Osteonics Corp
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Filing: 1988-02-22
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Granted: 1989-06-06
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Expires: 2008-02-22
Abstract
Abstract There is disclosed a bone cement composition comprising (a) a liquid component comprising a monomer of an acrylic ester and (b) a powdered component comprising, based on the weight of the powdered component, (i) from 0 to about 20 percent of a methyl methacrylate homopolymer, (ii) from about 30 to about 60 percent of a methyl methacrylate-styrene copolymer, and (iii) from about 30 to about 60 percent of a methyl methacrylate-butyl methacrylate copolymer.
Inventors
- 👤 Nestor A. Arroyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:41
CPC Classifications
A; A61; A61L; A61L24/00; A61L24/04; A61L24/043; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2002/4631; A61L2430/00; A61L2430/02; Y; Y10; Y10S; Y10S525/00; Y10S525/937
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A bone cement composition comprising: (a) a liquid component comprising a monomer of an acrylic ester, and (b) a powdered component comprising, based on the weight of the powdered component, (i) from 0 to about 20 percent of a methyl methacrylate homopolymer, (ii) from about 30 to about 60 percent of a methyl methacrylate-styrene copolymer, (iii) from about 30 to about 60 percent of a methyl methacrylate-butyl methacrylate copolymer.
Claim 2
Dependent Claim
69 words
A bone cement composition comprising: (a) a liquid component comprising a monomer of an acrylic ester, and (b) a powdered component comprising, based on the weight of the powdered component, (i) from 0 to about 20 percent of a methyl methacrylate homopolymer, (ii) from about 30 to about 60 percent of a methyl methacrylate-styrene copolymer, (iii) from about 30 to about 60 percent of a methyl methacrylate-butyl methacrylate copolymer.
Claim 3
Dependent Claim
19 words
The composition of claim 1 further comprising a free radical stabilizer and a polymerization accelerator incorporated in component (a).
Claim 4
Dependent Claim
19 words
The composition of claim 2 wherein said free radical stabilizer is hydroquinone and said polymerization accelerator is N,N-dimethyl paratoluidine.
Claim 5
Dependent Claim
25 words
The composition of claim 1 wherein component b(i) is present at about 1 to about 20 percent, based on the weight of the powdered component.
Claim 6
Dependent Claim
10 words
The composition of claim 1 essentially free of component (b)(i).
Claim 7
Dependent Claim
27 words
The composition of claim 5 wherein component (b)(ii) is present at about 50 percent by weight and component (b)(iii) is present at about 50 percent by weight.
Claim 8
Dependent Claim
14 words
The composition of claim 1 further comprising an opacifying agent in the powdered component.
Claim 9
Dependent Claim
76 words
A process for the production of a bone cement composition comprising combining: (a) a liquid component comprising a monomer of an acrylic ester with (b) a powdered component comprising, based on the weight of the powdered component, (i) from 0 to about 20 percent of a methyl methacrylate homopolymer, (ii) from about 30 to about 60 percent of a methyl methacrylate-styrene copolymer, (iii) from about 30 to about 60 percent of a methyl methacrylate-butyl methacrylate copolymer.
Claim 10
Dependent Claim
76 words
A process for the production of a bone cement composition comprising combining: (a) a liquid component comprising a monomer of an acrylic ester with (b) a powdered component comprising, based on the weight of the powdered component, (i) from 0 to about 20 percent of a methyl methacrylate homopolymer, (ii) from about 30 to about 60 percent of a methyl methacrylate-styrene copolymer, (iii) from about 30 to about 60 percent of a methyl methacrylate-butyl methacrylate copolymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |