US2791533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange resin indicator compound
Assignee: Security Trust Co
•
Filing: 1951-02-24
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Granted: 1957-05-07
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Expires: 1971-02-24
Abstract
No abstract record available.
Inventors
- 👤 Harry L Segal
- 👤 Leon L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:20
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/84; A; A61; A61K; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58; A61K47/585
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A DIAGNOSTIC INDICATOR ION EXCHANGE COMPOUND FOR DETERMINING WITHOUT INTUBATION WHETHER THE PH OF GASTRIC JUICE IN A STOMACH IS ABOVE OR BELOW A PREDETERMINED PH VALUE COMPRISING A NON-TOXIC, INSOLUBLE, GRANULATED, CATION-EXCHANGE, SYNTHETIC POLYMER RESIN HAVING BOUND THEREON FROM ABOUT 0.01 MILLIMOLES TO ABOUT 0.25 MILLIMOLE OF DISPLACEABLE INDICATOR CTION PER GRAM OF RESIN SO AS TO BE DISPLEACEABLE FROM THE ION EXCHANGE RESIN PEDOMINANTLY BY THE IONS FROM FREE HYDROCHLORIC ACID SECRETED IN THE STOMACH, SAID INDICATOR ION SELECTED FROM THE GROUP CONSISTING OF QUININUM ION AND 2,4-DIAMINO4''-ETHOXYAZOBENZENE CATION, SAID INDICATOR ION BEING ABSORBED READILY FROM THE GASTRO INTESTINAL TRACT AND BEING EASILY DETECTED IN URINE AND BLOOD.
Claim 2
Dependent Claim
110 words
A DIAGNOSTIC INDICATOR ION EXCHANGE COMPOUND FOR DETERMINING WITHOUT INTUBATION WHETHER THE PH OF GASTRIC JUICE IN A STOMACH IS ABOVE OR BELOW A PREDETERMINED PH VALUE COMPRISING A NON-TOXIC, INSOLUBLE, GRANULATED, CATION-EXCHANGE, SYNTHETIC POLYMER RESIN HAVING BOUND THEREON FROM ABOUT 0.01 MILLIMOLES TO ABOUT 0.25 MILLIMOLE OF DISPLACEABLE INDICATOR CTION PER GRAM OF RESIN SO AS TO BE DISPLEACEABLE FROM THE ION EXCHANGE RESIN PEDOMINANTLY BY THE IONS FROM FREE HYDROCHLORIC ACID SECRETED IN THE STOMACH, SAID INDICATOR ION SELECTED FROM THE GROUP CONSISTING OF QUININUM ION AND 2,4-DIAMINO4''-ETHOXYAZOBENZENE CATION, SAID INDICATOR ION BEING ABSORBED READILY FROM THE GASTRO INTESTINAL TRACT AND BEING EASILY DETECTED IN URINE AND BLOOD.
References Cited (Backward Citations)
US2054903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |