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US3608061A
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Radiopaque esophageal marshmallow bolus
Assignee: EDMUND F MCNALLY
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Filing: 1968-08-21
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Granted: 1971-09-21
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Expires: 1988-08-21
Abstract
Abstract A radiopaque esophageal bolus which comprises a marshmallow containing a radiopaque material in an amount sufficient to render the bolus opaque when exposed to X-rays or roentgen rays.
Inventors
- 👤 Edmund F Mcnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:21
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
The radiopaque esophageal bolus of claim 1, in which the amount of barium sulfate is from about 19 percent to about 37 percent by weight.
Claim 2
Dependent Claim
60 words
The radiopaque esophageal bolus of claim 1, which comprises a nonfluid, plastic, elastic marshmallow containing about 29 percent by weight of barium sulfate, about 2 percent by weight of gelatin, about 3 percent by weight of cornstarch, about 35 percent by weight of corn syrup, about 13 percent by weight of water, and about 18 percent by weight of sugar.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |