Patent US3783868A successfully refreshed from Google Patents.
US3783868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percutaneous implant
Assignee: Gulf Oil Corp
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Filing: 1971-05-06
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Granted: 1974-01-08
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Expires: 1991-05-06
Abstract
Abstract A percutaneous device for drug injection in a living body which is implanted through the skin and which has a pyrolytic carbon coating. The device has a stem and a stabilizing flange, and a collar associated with the stem for preventing the progressive growth of epithelium tissue along the stem and for anchoring the device. A normally closed valve is in a passageway through the stem for administration of medication.
Inventors
- 👤 J Bokros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:01
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/0247; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61M2039/0261; A61M2039/0285
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
33 words
A percutaneous implant device in accordance with claim 1 wherein said medication reservoir and release means comprises a porous membrane which is affixed to the end of said passageway adjacent said stabilizing flange.
Claim 2
Dependent Claim
20 words
A percutaneous implant device in accordance with claim 1 wherein said elastomeric plug is provided with a pressure-operable passageway therethrough.
Claim 3
Dependent Claim
49 words
A percutaneous implant device in accordance with claim 1 wherein said collar is formed from a refractory metal screen having a wire diameter of from about 0.05 mm to about 0.1 mm and wherein the spacing between the wire of said pyrolytic carbon coated collar is about 1 mm.
Claim 4
Dependent Claim
18 words
A percutaneous implant device in accordance with claim 1 wherein said collar substrate is a perforated metal sheet.
Claim 5
Dependent Claim
18 words
A percutaneous implant device in accordance with claim 1 wherein said collar substrate is a carbon fiber mesh.
Claim 6
Dependent Claim
26 words
A percutaneous implant device in accordance with claim 1 wherein said elastomeric plug valve is an unperforated elastomer plug adapted for use with a hypodermic needle.
Claim 7
Dependent Claim
22 words
A percutaneous implant device in accordance with claim 2 wherein said elastomeric plug valve is provided with a pressure-operable latent passageway therethrough.
Claim 8
Dependent Claim
18 words
A percutaneous implant device in accordance with claim 1 wherein the surface of said pyrolytic carbon is oxidized.
Claim 9
Dependent Claim
39 words
A percutaneous implant device in accordance with claim 2 wherein said stem is provided with a second pyrolytic carbon coated refractory flange, adjacent the externally positionable end of said stem opposite its base, for protection of the implantation site.
Claim 10
Dependent Claim
192 words
A percutaneous implant device for drug injection in a living body, comprising a pyrolytic carbon coated refractory stem having a passageway therethrough, a pyrolytic carbon coated refractory stabilizing flange adjacent the base of said stem for stabilizinG the implant device in surrounding subcutaneous tissues, a porous, carbonaceous physiologically inert layer into and through which epithelium tissue will grow, said layer being located circumferentially about said stem for preventing encapsulation of the device by the progressive growth of epithelium tissue along said stem and for anchoring the implant device upon epithelium growth therethrough, a normally closed elastomeric plug valve in said passageway for administering medication through said passageway and to prevent entrance through said passageway of external pathogens or other undesired material, and medication and release means in communication with said passageway for retaining a reservoir of medication administered through said valve and for releasing medication in the reservoir into the surrounding tissues in a predetermined manner, said pyrolytic carbon coacting on said stem and flange being an integral pyrolytic carbon coating having a thickness of at least about 10 microns, and a density of at least about 1.5 grams per cubic centimeter.
Claim 11
Dependent Claim
20 words
A percutaneous implant device in accordance with claim 12 wherein said elastomeric plug is provided with a pressure-operable passageway therethrough.
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |