US4044170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical implant and method for its production
Assignee: Pfaudler Inc
•
Filing: 1976-04-08
•
Granted: 1977-08-23
•
Expires: 1996-04-08
Abstract
Abstract A surgical implant is produced by coating a metallic substrate with enamel. The metallic substrate provides structural strength and the enamel provides chemical stability, resistance to wear, tissue compatibility, progressive ingrowth and electrical insulating properties. The implant may be produced by coating a portion of the metallic substrate with a partially crystallized enamel, and then positioning the implant on a firing support with the partially crystallized enamel in contact with the support and coating the remaining non-enamelled surface.
Inventors
- 👤 Heinz Scharbach
- 👤 Achim Engelhardt
- 👤 Peter Bunz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:19
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/866; A61F2/28; A61F2/32; A61F2/36; A61F2/44; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30084; A61F2002/30316; A61F2002/30329; A61F2002/30433; A61F2002/30535; A61F2002/30576; A61F2002/30578; A61F2220/00; A61F2220/0025; A61F2220/0041; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00389; A61F2310/00928; A61F2310/00934; A61L2430/00; A61L2430/24; Y; Y10; Y10S; Y10S606/00; Y10S606/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A method for the manufacture of a surgical implant comprising a metallic substrate wholly coated with porcelain enamel, comprising: applying crystallizable porcelain enamel frit to part of said substrate; firing said frit to form an enamel coating on part of said substrate; subjecting said enamel coating to controlled heat treatment to partially crystallize said coating, whereby the viscosity of said coating is increased; applying porcelain enamel frit to the remaining non-enamelled surface of said metallic substrate; positioning said implant upon a firing support with said partially crystallized enamel in contact with said support; and first the frit applied to the previously non-enamelled surface to form an enamelled coating over said surface.
Claim 2
Independent Claim
111 words
A method for the manufacture of a surgical implant comprising a metallic substrate wholly coated with porcelain enamel, comprising: applying crystallizable porcelain enamel frit to part of said substrate; firing said frit to form an enamel coating on part of said substrate; subjecting said enamel coating to controlled heat treatment to partially crystallize said coating, whereby the viscosity of said coating is increased; applying porcelain enamel frit to the remaining non-enamelled surface of said metallic substrate; positioning said implant upon a firing support with said partially crystallized enamel in contact with said support; and first the frit applied to the previously non-enamelled surface to form an enamelled coating over said surface.
References Cited (Backward Citations)
US2864721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |