US5366471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esophageal dilation bougie
Assignee: Pilling Weck Inc
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Filing: 1993-10-26
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Granted: 1994-11-22
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Expires: 2013-10-26
Abstract
Abstract An esophageal dilator comprises a hollow, flexible tube filled with a dispersion of Tungsten particles in a fluid silicone material for treating cardiospasm, esophagitis, stenosis and other esophageal diseases.
Inventors
- 👤 Richard G. Jones
- 👤 Jeffrey A. Miner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:34
CPC Classifications
A; A61; A61M; A61M29/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
An esophageal dilation bougie for treating esophageal strictures comprising a flexible tube of silicone rubber having a distal end and a proximal end, with a tapered tip at the distal end and having an enclosed, hollow space extending proximally from the tapered tip, the hollow space being filled with a substantially homogeneous material; wherein a portion of the bougie extending proximally from the tip is radiopaque and sufficiently heavy to effect dilation, and in which the material comprises Tungsten particles suspended in a fluid silicone material.
Claim 2
Dependent Claim
86 words
An esophageal dilation bougie for treating esophageal strictures comprising a flexible tube of silicone rubber having a distal end and a proximal end, with a tapered tip at the distal end and having an enclosed, hollow space extending proximally from the tapered tip, the hollow space being filled with a substantially homogeneous material; wherein a portion of the bougie extending proximally from the tip is radiopaque and sufficiently heavy to effect dilation, and in which the material comprises Tungsten particles suspended in a fluid silicone material.
Claim 3
Dependent Claim
27 words
An esophageal dilation bougie according to claim 1 in which substantially all of the Tungsten particles are in the range of 5 to 250 microns in size.
Claim 4
Dependent Claim
27 words
An esophageal dilation bougie according to claim 1 in which substantially all of the Tungsten particles are in the range of 15 to 100 microns in size.
Claim 5
Dependent Claim
35 words
An esophageal dilation bougie according to claim 1 in which the Tungsten particles are present in the material in an amount such that the density of the flowable material is approximately 9 to 11 g/cc.
Claim 6
Dependent Claim
32 words
An esophageal dilation bougie according to claim 1 in which the Tungsten particles are present in the material in an amount such that the density of the material is approximately 9.5 g/cc.
Claim 7
Dependent Claim
91 words
An esophageal dilation bougie for treating esophageal strictures comprising a flexible tube of silicone rubber having a distal end and a proximal end, with a tapered tip at the distal end and having an enclosed, hollow spaced extending proximally from the tapered tip, the hollow space being filled with a substantially homogeneous material; wherein a portion of the bougie extending proximally from the tip is radiopaque and sufficiently heavy to effect dilation, and in which the material comprises Tungsten particles suspended in a mixture of liquid silicone rubber and silicone fluid.
Claim 8
Dependent Claim
91 words
An esophageal dilation bougie for treating esophageal strictures comprising a flexible tube of silicone rubber having a distal end and a proximal end, with a tapered tip at the distal end and having an enclosed, hollow spaced extending proximally from the tapered tip, the hollow space being filled with a substantially homogeneous material; wherein a portion of the bougie extending proximally from the tip is radiopaque and sufficiently heavy to effect dilation, and in which the material comprises Tungsten particles suspended in a mixture of liquid silicone rubber and silicone fluid.
Claim 9
Dependent Claim
39 words
An esophageal dilation bougie according to claim 6 in which the mixture of liquid silicone rubber and silicone fluid consists of approximately 40% to 50% by weight liquid silicone rubber and approximately 50% to 60% by weight silicone fluid.
Claim 10
Dependent Claim
35 words
An esophageal dilation bougie according to claim 6 in which the mixture of liquid silicone rubber and silicone fluid consists of approximately 45% by weight liquid silicone rubber and approximately 55% by weight silicone fluid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-21 | 1998-05-23 | 1998-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-21 | 2002-05-23 | 2002-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-21 | 2006-05-23 | 2006-11-22 | $7700.00 | Window Closed / Lapsed |