US5160724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barium sulfate contrast medium for x-ray examination of the large intestine
Assignee: OHTA SEIYAKU 51 SANJOMACHI OMIYA-SHI SAITAMA-KEN JAPAN KK
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Filing: 1989-09-19
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Granted: 1992-11-03
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Expires: 2009-09-19
Abstract
Abstract A new barium sulfate contrast medium comprising 20 to 30 w/v % barium sulfate, gum tragacanth and either sodium carboxymethyl cellulose or gum arabic is useful for x-ray examination of the large intestine having adequate radiolucency combined with high coating abilities.
Inventors
- 👤 Yoshito Tonariya
- 👤 Yukihito Wada
- 👤 Kazuhiro Yamaguchi
- 👤 Tomio Yamazaki
- 👤 Isamu Sakai
- 👤 Shigeru Yokoi
- 👤 Mitsuo Togashi
- 👤 Yukihiro Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:05
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A contrast medium for use for X-ray examination of the large intestine according to the double contrast method, in the form of an enema which comprises an aqueous suspension containing 20 to 30 W/V % of barium sulfate, 2.0 to 0.5 W/V % of gum tragacanth, and one or more suspending agents selected from the group consisting of sodium carboxymethyl cellulose and gum arabic.
Claim 2
Dependent Claim
64 words
A contrast medium for use for X-ray examination of the large intestine according to the double contrast method, in the form of an enema which comprises an aqueous suspension containing 20 to 30 W/V % of barium sulfate, 2.0 to 0.5 W/V % of gum tragacanth, and one or more suspending agents selected from the group consisting of sodium carboxymethyl cellulose and gum arabic.
References Cited (Backward Citations)
US3689630A
Cited
US4069306A
Cited
US4120946A
Cited
JPS55127327A
Cited
WO1984004888A1
Cited
JPS6069041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-03 | 1996-05-04 | 1996-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-03 | 2000-05-04 | 2000-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-03 | 2004-05-04 | 2004-11-03 | $7700.00 | Window Closed / Lapsed |