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US5429634A Expired / Lapsed US ⏱️ 0.0 years remaining

Biogenic implant for drug delivery and method

Assignee: PDT Systems
•
Filing: 1993-09-09
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Granted: 1995-07-04
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Expires: 2013-09-09
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Abstract

Abstract A medicament-dispensing medical implant is described which is fabricated from relatively non-inflammatory biogenic tissue or biopolymers for implantation in or adjacent to a target issue in the human body. The implant, whic is non-thrombogenic, optically transluscent and relatively non-inflammatory, delivers relatively high doses of one or a combination of medicaments locally in a sustained fashion while systemically delivering a relatively low dose of said medicament(s). In one embodiment, a biogenic tissue such as endothelium from the interior of an artery of a donor animal is first stabilized by appropriate chemical treatment, then burdened with a medicament. The implant, which is preferably in the form of a stent, plug or a patch, releases the medicament over a period of time. Desirable sequellae to the implantation of the device includes the relative absence of an inflammatory response when compared to synthetic implants and reendotheliazation of the implant with autologous endothelium which encapsulates and anatomically stabilizes the implant.

Inventors

  • 👤 Hugh L. Narciso, Jr.

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 20:19
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0019; A61K9/0024; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61K41/00; A61K41/0057; A61L; A61L31/00; A61L31/04; A61L31/042; A61L31/06; A61L31/14; A61L31/148; A61L31/16; A61F2210/00; A61F2210/0004; A61F2210/0014; A61F2210/0019; A61F2220/00; A61F2220/0008; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054; A61F2250/00; A61F2250/0058; A61F2250/0067; A61L2300/00; A61L2300/40; A61L2300/416

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 49 words
A medicament dispensing medical implant for implantation within the body of a mammal comprising a biocompatible, bioabsorbable, biogenic material impregnated with at least one medicament and wherein said medicament is capable of being substantially released from said biocompatible, bioabsorbable, biogenic material and wherein said medicament is a photosensitizer drug.
Claim 2
Dependent Claim 49 words
A medicament dispensing medical implant for implantation within the body of a mammal comprising a biocompatible, bioabsorbable, biogenic material impregnated with at least one medicament and wherein said medicament is capable of being substantially released from said biocompatible, bioabsorbable, biogenic material and wherein said medicament is a photosensitizer drug.
Claim 3
Dependent Claim 16 words
The medical implant of claim 1 wherein said biogenic material is formed into a tubular stent.
Claim 4
Dependent Claim 15 words
The medical implant of claim 1 wherein said biogenic material is formed into a plug.

References Cited (Backward Citations)

US4849226A Cited
US4895724A Cited
US5024841A Cited
US5110604A Cited
US5264214A Cited
US5169395A Cited
US5282823A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1998-07-03 1999-01-02 1999-07-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2002-07-03 2003-01-02 2003-07-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2006-07-03 2007-01-02 2007-07-04 $7700.00 Window Closed / Lapsed

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