US4365359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PMMA Coated bone connective prostheses and method of forming same
Assignee: SIRDAN RESEARCH Ltd Inc
•
Filing: 1981-03-31
•
Granted: 1982-12-28
•
Expires: 2001-03-31
Abstract
Abstract A PMMA film is fixedly adhered to a prosthetic element by applying PMMA to the surface of the prosthetic element in the presence of a silane coupling agent. The resultant prosthesis is adapted to be joined to bone by means of bone cement.
Inventors
- 👤 Simon Raab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:26
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/34; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/3094; A61F2/30965; A61F2/32; A61F2/36; A61F2/3601; A61F2/3603; A61F2/38; A61F2/389; A61F2/34; A61F2/3662; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30011; A61F2002/30014; A61F2002/30906; A61F2002/30925; A61F2002/30929; A61F2/3609; A61F2002/3625; A61F2002/3631; A61F2/46; A61F2002/4631; A61F2250/00; A61F2250/0014; A61F2250/0018; A61F2250/0023; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00389; A61F2310/00952
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
86 words
In a process for fixedly adhering a polymethylmethacrylate film to a prosthetic element to provide an improved prosthesis adapted to be joined to bone by means of bone cement, said prosthesis having been prepared by the steps of treating said prosthetic element to eliminate any weak boundary layer, applying polymethylmethacrylate to said treated surface to form a film thereon; and thereafter annealing said polymethylmethacrylate film, the improvement which comprises applying polymethylmethacrylate to the surface of said prosthetic element in the presence of a silane coupling agent.
Claim 2
Dependent Claim
86 words
In a process for fixedly adhering a polymethylmethacrylate film to a prosthetic element to provide an improved prosthesis adapted to be joined to bone by means of bone cement, said prosthesis having been prepared by the steps of treating said prosthetic element to eliminate any weak boundary layer, applying polymethylmethacrylate to said treated surface to form a film thereon; and thereafter annealing said polymethylmethacrylate film, the improvement which comprises applying polymethylmethacrylate to the surface of said prosthetic element in the presence of a silane coupling agent.
Claim 3
Dependent Claim
15 words
A process as defined in claim 1 wherein said prosthetic element is composed of metal.
Claim 4
Dependent Claim
29 words
A process as defined in claim 2 wherein said element is cooled to less than 30° C. prior to application of the silane coupling agent and PMMA film thereto.
Claim 5
Dependent Claim
33 words
A process as defined in claim 3 wherein said prosthetic element is treated in an alkaline bath and then cooled to less than 30° C. immediately prior to applying said silane coupling agent.
Claim 6
Dependent Claim
14 words
A process as defined in claim 4 wherein said metal is a cobalt-chromium-molybdenum alloy.
Claim 7
Dependent Claim
14 words
A process as defined in claim 4 wherein said metal is a titanium alloy.
Claim 8
Dependent Claim
13 words
A process as defined in claim 3 wherein said metal is stainless steel.
Claim 9
Dependent Claim
23 words
A process as defined in claim 3 wherein said silane coupling agent is admixed with said polymethylmethacrylate prior to application to said surface.
Claim 10
Dependent Claim
23 words
A process as defined in claim 3 wherein said surface is treated with said silane coupling agent prior to application of said polymethylmethacrylate.
Claim 11
Dependent Claim
14 words
A process as defined in claim 3 wherein said silane coupling agent is gamma-methacryloxypropyltrimethoxysilane.
Claim 12
Dependent Claim
9 words
A prosthesis obtained by the process of claim 1.
Claim 13
Dependent Claim
9 words
A prosthesis obtained by the process of claim 2.
Claim 14
Dependent Claim
9 words
A prosthesis obtained by the process of claim 3.
Claim 15
Dependent Claim
9 words
A prosthesis obtained by the process of claim 4.
Claim 16
Dependent Claim
9 words
A prosthesis obtained by the process of claim 5.
Claim 17
Dependent Claim
9 words
A prosthesis obtained by the process of claim 6.
Claim 18
Dependent Claim
9 words
A prosthesis obtained by the process of claim 7.
Claim 19
Dependent Claim
9 words
A prosthesis obtained by the process of claim 8.
Claim 20
Dependent Claim
9 words
A prosthesis obtained by the process of claim 9.
Claim 21
Dependent Claim
9 words
A prosthesis obtained by the process of claim 10.
Claim 22
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 11 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
Claim 23
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 12 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
Claim 24
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 13 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
Claim 25
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 14 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
Claim 26
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 15 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
Claim 27
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 16 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
Claim 28
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 17 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
Claim 29
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 18 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
Claim 30
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 19 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
Claim 31
Dependent Claim
28 words
A process comprising joining a prosthesis as defined in claim 20 to bone by contacting said bone and the polymethylmethacrylate film adhered to said prosthesis with bone cement.
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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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |