Patent US3900033A successfully refreshed from Google Patents.
US3900033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dilator for cervical canal
Assignee: Ortho Pharmaceutical Corp
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Filing: 1973-03-07
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Granted: 1975-08-19
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Expires: 1993-03-07
Abstract
Abstract A novel inflatable device is disclosed for use in dilating various body cavities, and especially the human cervix, comprising an envelope member having an enlarged bulbous portion on one end, and a shield at the opposite end. The envelope member is inflatable with suitable gases such as carbon dioxide, or liquids such as saline, distilled water and the like.
Inventors
- 👤 Robert Irvin Leininger
- 👤 Joseph Ronald Preston
- 👤 Brenton Ray Lower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:35
CPC Classifications
A; A61; A61M; A61M29/00; A61M29/02; A61B; A61B17/00; A61B17/42; A61B2017/4216; A61B2017/4225
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
A body canal dilating device comprising a relatively nonelastic, non-expansible, collapsible, inflatable envelope, having two portions, the first said portion in the inflated state having a relatively constant diameter and a length sufficient to occlude a canal having more than one os, and the other of said portions contiguous with the first said portion and being a terminal enlarged bulbous portion having a diameter in excess of said constant diameter in the inflated state, a tubular inserter member entering the first said portion and while inside thereof extending therethrough and into the inside of the other of said portions, a shield located in proximity of the entrance to the first said portion and engaged with said tubular member, said tubular member being adapted to permit entry into said envelope of a pressurizing fluid.
Claim 2
Dependent Claim
133 words
A body canal dilating device comprising a relatively nonelastic, non-expansible, collapsible, inflatable envelope, having two portions, the first said portion in the inflated state having a relatively constant diameter and a length sufficient to occlude a canal having more than one os, and the other of said portions contiguous with the first said portion and being a terminal enlarged bulbous portion having a diameter in excess of said constant diameter in the inflated state, a tubular inserter member entering the first said portion and while inside thereof extending therethrough and into the inside of the other of said portions, a shield located in proximity of the entrance to the first said portion and engaged with said tubular member, said tubular member being adapted to permit entry into said envelope of a pressurizing fluid.
Claim 3
Dependent Claim
24 words
The device of claim 1 wherein said first portion is of a length sufficient to occlude the entire length of the human cervical canal.
Claim 4
Dependent Claim
22 words
The device of claim 2 wherein said first portion has a diameter in the inflated state of from 12 to 14 mm.
Claim 5
Dependent Claim
22 words
The device of claim 3 wherein said first portion in the collapsed state measures between 1 1/2 to 4 mm. in diameter.
Claim 6
Dependent Claim
26 words
The device of claim 4 wherein the first portion and sid terminal enlarged bulbous portion are polyurethane having a molecular weight of between 20,000 and 80,000.
Claim 7
Dependent Claim
14 words
The device of claim 5 wherein said tubular inserter member is at least semirigid.
Claim 8
Dependent Claim
43 words
The method for dilating a body canal which comprises inserting the device of claim 6 into a body canal and directing the flow of a fluid into said device to pressurize the device thereby and to cause consequent dilatation of said body canal.
Claim 9
Dependent Claim
22 words
The method of claim 7 wherein the device is pressurized to within 4 to 9 pounds per square inch of gauge pressure.
Claim 10
Dependent Claim
13 words
The method of claim 7 wherein the pressurized fluid is an aqueous fluid.
Claim 11
Dependent Claim
12 words
The method of claim 7 wherein the pressurized fluid is carbon dioxide.
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |