US5564439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infusion device for soft tissue
Assignee: Individual
•
Filing: 1994-12-27
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Granted: 1996-10-15
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Expires: 2014-12-27
Abstract
Abstract An implant is provided with an open-celled silicone elastomer foam outer layer. The implant may be formed by compressively deforming beads mixed with liquid elastomer in a mold containing a preformed support structure. The elastomer is cured and the beads dissolved out. Infusion and sensor catheters covered with the foam provide improved transport rates and faster response.
Inventors
- 👤 George J. Picha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:11
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/14; A61L27/18; A61F; A61F2/00; A61F2/0077; A61F2/02; A61F2/30; A61F2/30767; A61F2/30771; A61L27/50; A61L27/56; A61F2002/30001; A61F2002/30667; A61F2002/30677; A61F2002/3092; A61F2250/00; A61F2250/0058; A61F2250/0067; B; B29; B29C; B29C70/00; B29C70/68; B29C70/70; B29C70/78; B29K; B29K2021/00; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/753; B29L2031/7532
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
An infusion device for infusion of a therapeutic substance into soft tissue, said device comprising: a receptacle for said therapeutic substance, said receptacle having a therapeutic substance emitting membrane, said membrane having an internal and an external surface, said internal surface being in contact with said therapeutic substance and having a plurality of pits spaced apart between 50 and 2,000 microns, said pits being between 50 and 2,000 microns across; and a polymeric open-celled foam between 10 microns and 2,000 microns in thickness bonded to a substantial portion of said external surface of said membrane, said pits extending at least partially into said foam and at most 100 microns beyond said foam.
Claim 2
Dependent Claim
112 words
An infusion device for infusion of a therapeutic substance into soft tissue, said device comprising: a receptacle for said therapeutic substance, said receptacle having a therapeutic substance emitting membrane, said membrane having an internal and an external surface, said internal surface being in contact with said therapeutic substance and having a plurality of pits spaced apart between 50 and 2,000 microns, said pits being between 50 and 2,000 microns across; and a polymeric open-celled foam between 10 microns and 2,000 microns in thickness bonded to a substantial portion of said external surface of said membrane, said pits extending at least partially into said foam and at most 100 microns beyond said foam.
Claim 3
Dependent Claim
15 words
An infusion device according to claim 1, wherein said polymeric foam is a silicone elastomer.
Claim 4
Dependent Claim
16 words
An infusion device according to claim 1, wherein said membrane is permeable to said therapeutic substance.
Claim 5
Dependent Claim
13 words
An infusion device according to claim 1, wherein said pits have orifices therein.
Claim 6
Dependent Claim
15 words
An infusion device according to claim 1, further comprising a catheter communicating with said receptacle.
Claim 7
Dependent Claim
17 words
An infusion device according to claim 1, further comprising a subcutaneous needle port communicating with said receptacle.
Claim 8
Dependent Claim
16 words
An infusion device according to claim 1, further comprising a subcutaneous pump communicating with said receptacle.
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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) | 1999-10-15 | 2000-04-15 | 2000-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-15 | 2004-04-15 | 2004-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-15 | 2008-04-15 | 2008-10-15 | $7700.00 | Window Closed / Lapsed |