US2950195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of metal ions from gum arabic
Assignee: Litho Chemical and Supply Co Inc
•
Filing: 1956-12-05
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Granted: 1960-08-23
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Expires: 1976-12-05
Abstract
No abstract record available.
Inventors
- 👤 George R Hodgins
- 👤 Cyan Erwin Di
- 👤 Timmerman Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:36
CPC Classifications
C; C08; C08L; C08L5/00; G; G03; G03F; G03F7/00; G03F7/004; G03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF PREPARING A PRECIPITATE-FREE AQUEOUS GUM ARABIC SOLUTION, CONTAINING APPROXIMATELY 73% WATER AND 21% GUM ARABIC AND HAVING NOT MORE THAN 70 PARTS PER MILLION OF CA++ IONS PER MILLILITER FROM GUM ARABIC CONTAINING ABOUT 0.7% CALCIUM AND ABOUT 0.6% MAGNESIUM WHICH CONSISTS IN ADDING TO AN INITIAL GUM ARABIC SOLUTION OF THE APPROXIMATE COMPOSITION: PERCENT WATER --------------------------------------------- 71.5 GUM ARABIC ---------------------------------------- 28.3 PHENOL (88%) -------------------------------------- 0.2 AN AMOUNT OF (NH4)2HPO4 WHICH IS THE STOICHIOMETRIC EQUIVALENT OF THE CALCIUM AND MAGNESIUM ION CONTENTS OF SAID SOLUTION, ADDING AMMONIUM HYDROXIDE TO RAISE THE PH OF THE SOLUTION TO AT LEAST 8.5 AND IN THE RANGE OF 8.5 TO ABOUT 10, AND ALLOWING THE WHOLE TO STAND UNTIL NO FURTHER CALCIUM AND MAGNESIUM PHOSPHATES PRECIPITATE.
Claim 2
Independent Claim
125 words
THE METHOD OF PREPARING A PRECIPITATE-FREE AQUEOUS GUM ARABIC SOLUTION, CONTAINING APPROXIMATELY 73% WATER AND 21% GUM ARABIC AND HAVING NOT MORE THAN 70 PARTS PER MILLION OF CA++ IONS PER MILLILITER FROM GUM ARABIC CONTAINING ABOUT 0.7% CALCIUM AND ABOUT 0.6% MAGNESIUM WHICH CONSISTS IN ADDING TO AN INITIAL GUM ARABIC SOLUTION OF THE APPROXIMATE COMPOSITION: PERCENT WATER --------------------------------------------- 71.5 GUM ARABIC ---------------------------------------- 28.3 PHENOL (88%) -------------------------------------- 0.2 AN AMOUNT OF (NH4)2HPO4 WHICH IS THE STOICHIOMETRIC EQUIVALENT OF THE CALCIUM AND MAGNESIUM ION CONTENTS OF SAID SOLUTION, ADDING AMMONIUM HYDROXIDE TO RAISE THE PH OF THE SOLUTION TO AT LEAST 8.5 AND IN THE RANGE OF 8.5 TO ABOUT 10, AND ALLOWING THE WHOLE TO STAND UNTIL NO FURTHER CALCIUM AND MAGNESIUM PHOSPHATES PRECIPITATE.
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) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |