US4215103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a preparation for diagnostic radiology and apparatus therefor
Assignee: Linton Medical Services Ltd
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Filing: 1978-02-01
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Granted: 1980-07-29
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Expires: 1998-02-01
Abstract
Abstract A diagnostic radiology preparation for injestion by patients, which preparation comprises a radio opaque substance such as barium sulphate, a carrier such as water and a dissolved and/or absorbed gas such as carbon dioxide. The gas is present in an amount such that it is released when the preparation is ingested.
Inventors
- 👤 Arthur R. Millington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:45
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0404
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
A method of producing a preparation for diagnostic radiology, the preparation, when taken into the body of a user, releasing a gas that expands within the body of a user, comprising: placing a mixture containing a radio opaque substance and a carrier in a pressure vessel, the radio opaque substance being present in a quantity sufficient for diagnostic radiology; adding a non-toxic gas to the pressure vessel; and cycling the gas and mixture for a period of time sufficient to obtain a predetermined level of dissolved gas within the mixture, the level being sufficient to cause release of the gas within the body of a user.
Claim 2
Independent Claim
106 words
A method of producing a preparation for diagnostic radiology, the preparation, when taken into the body of a user, releasing a gas that expands within the body of a user, comprising: placing a mixture containing a radio opaque substance and a carrier in a pressure vessel, the radio opaque substance being present in a quantity sufficient for diagnostic radiology; adding a non-toxic gas to the pressure vessel; and cycling the gas and mixture for a period of time sufficient to obtain a predetermined level of dissolved gas within the mixture, the level being sufficient to cause release of the gas within the body of a user.
Claim 3
Dependent Claim
15 words
A method according to claim 1, wherein the cycling includes cooling the gas and mixture.
Claim 4
Dependent Claim
24 words
A method according to claim 1, wherein the cycling includes spraying the mixture into the pressure vessel through an inlet in the top thereof.
Claim 5
Dependent Claim
21 words
A method according to claim 1, including removing air from the container while the gas is being added to the container.
Claim 6
Independent Claim
95 words
An apparatus for producing a preparation for diagnostic radiology comprising: vessel means for defining a pressure vessel; means for adding a mixture of a radio opaque substance and a carrier into said vessel means, the radio opaque substance being present in a quantity sufficient for diagnostic radiology; means for adding a non-toxic gas to said vessel means; and means for cycling the mixture and gas so that a preparation having a predetermined level of gas dissolved therein is produced, the level being sufficient to cause release of the gas within the body of a user.
Claim 7
Independent Claim
95 words
An apparatus for producing a preparation for diagnostic radiology comprising: vessel means for defining a pressure vessel; means for adding a mixture of a radio opaque substance and a carrier into said vessel means, the radio opaque substance being present in a quantity sufficient for diagnostic radiology; means for adding a non-toxic gas to said vessel means; and means for cycling the mixture and gas so that a preparation having a predetermined level of gas dissolved therein is produced, the level being sufficient to cause release of the gas within the body of a user.
Claim 8
Dependent Claim
37 words
An apparatus according to claim 5, wherein the pressure vessel has an inlet in a top thereof and wherein the means for cycling includes means positioned in said inlet for spraying the mixture into the pressure vessel.
Claim 9
Dependent Claim
19 words
An apparatus according to claim 5, wherein the means for cycling includes means for cooling the mixture and gas.
Claim 10
Dependent Claim
17 words
An apparatus according to claim 5, further comprising means for controlling the pressure within said pressure vessel.
Claim 11
Dependent Claim
27 words
An apparatus according to claim 8, wherein said means for controlling the pressure includes means for removing air from said pressure vessel as gas is being added.
References Cited (Backward Citations)
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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) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |