Patent US3236735A successfully refreshed from Google Patents.
US3236735A
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Barium sulfate and low viscosity monosaccharide polymer x-ray contrast media
Assignee: Mallinckrodt Chemical Works
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Filing: 1962-09-14
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Granted: 1966-02-22
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Expires: 1982-09-14
Abstract
No abstract record available.
Inventors
- 👤 Garland R Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:43
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A COMPOSITION COMPRISING BARIUM SULFATE AND AT LEAST ONE NON-TOXIC FLUIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER-DISPERSIBLE COLLOIDAL ANIONIC ETHER AND ESTER DERIVATIVES OF LOW POLYMERS OF MONOSACCHARIDES, A 2% AQUEOUS SOLUTION OF WHICH AGENT AT 25*C. HAS A VISCOSITY RATING NOT GREATER THAN APPROXIMATELY 50 CENTIPOISES, THE PROPORTION OF FLUIDIZING AGENT BEING IN THE RANGE OF APPROXIMATELY 0.04 GRAM TO APPROXIMATELY 1.0 GRAM PER 100 GRAMS OF BARIUM SULFATE, SAID COMPOSITION BEING READILY DISPERSIBLE UPON THE ADDITION OF SUFFICIENT WATER, TO PRODUCE A SUSPENSION CONTAINING AT LEAST 40% WEIGHT/WEIGHT OF BARIUM SULFATE.
Claim 2
Dependent Claim
95 words
A COMPOSITION COMPRISING BARIUM SULFATE AND AT LEAST ONE NON-TOXIC FLUIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER-DISPERSIBLE COLLOIDAL ANIONIC ETHER AND ESTER DERIVATIVES OF LOW POLYMERS OF MONOSACCHARIDES, A 2% AQUEOUS SOLUTION OF WHICH AGENT AT 25*C. HAS A VISCOSITY RATING NOT GREATER THAN APPROXIMATELY 50 CENTIPOISES, THE PROPORTION OF FLUIDIZING AGENT BEING IN THE RANGE OF APPROXIMATELY 0.04 GRAM TO APPROXIMATELY 1.0 GRAM PER 100 GRAMS OF BARIUM SULFATE, SAID COMPOSITION BEING READILY DISPERSIBLE UPON THE ADDITION OF SUFFICIENT WATER, TO PRODUCE A SUSPENSION CONTAINING AT LEAST 40% WEIGHT/WEIGHT OF BARIUM SULFATE.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |