Patent US4120946A successfully refreshed from Google Patents.
US4120946A
Expired / Lapsed
US
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Pharmaceutical compositions for barium opacification and method of preparing them
Assignee: Individual
•
Filing: 1977-05-23
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Granted: 1978-10-17
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Expires: 1997-05-23
Abstract
Abstract The invention is directed to a pharmaceutical composition for barium opacification of the digestive tract, comprising colloidal barium sulfate and a polyacrylamide in an aqueous vehicle, and a method of preparing the same.
Inventors
- 👤 Andre Queuille
- 👤 Francoise Herbemont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:31
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0404
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
A pharmaceutical composition for barium opacification of the digestive tract, comprising colloidal barium sulfate and a polyacrylamide having a molecular weight of at least about one million in an aqueous vehicle, the polyacrylamide content being between 0.1% and 5% of the barium sulfate content.
Claim 2
Dependent Claim
44 words
A pharmaceutical composition for barium opacification of the digestive tract, comprising colloidal barium sulfate and a polyacrylamide having a molecular weight of at least about one million in an aqueous vehicle, the polyacrylamide content being between 0.1% and 5% of the barium sulfate content.
Claim 3
Dependent Claim
11 words
A composition according to claim 1, wherein the polyacrylamide is nonionic.
Claim 4
Dependent Claim
15 words
A composition according to claim 1, wherein the aqueous vehicle is formed of distilled water.
Claim 5
Dependent Claim
17 words
A composition according to claim 3 wherein an antiseptic agent has been added to the aqueous vehicle.
Claim 6
Dependent Claim
10 words
A composition according to claim 1 containing a thickening agent.
Claim 7
Dependent Claim
10 words
A composition according to claim 1 containing an antifoaming agent.
Claim 8
Dependent Claim
47 words
A method of preparing a pharmaceutical composition as defined in claim 1 comprising preparing an aqueous gel of the polyacrylamide and the aqueous vehicle, incorporating the resultant gel into screened colloidal barium sulfate, homogenizing, and adjusted to the desired volume by the addition of the aqueous vehicle.
Claim 9
Dependent Claim
18 words
A method according to claim 8 wherein a thickening agent and an antifoam agent are added before homogenizing.
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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |