US2597384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of colloidal barium sulfate
Assignee: GAF Chemicals Corp
•
Filing: 1948-11-27
•
Granted: 1952-05-20
•
Expires: 1968-11-27
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:40
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/46; C01F11/462
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR PREPARING COLLOIDAL AQUEOUS BARIUM SULFATE SOLUTION WHICH COMPRISES ADDING AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SULFATE SELECTED FROM THE CLASS CONSISTING OF SULFATES OF ALKALI METALS AND MONOVALENT INORGANIC NITROGEN BASES HAVING A MOLECULAR WEIGHT OF NOT MORE THAN 40, TO AN AQUEOUS SOLUTION OF BARIUM GLUCONATE WHILE AVOIDING FORMATION OF A LOCALIZED EXCESS OF UNREACTED SULFATE IONS, THE AMOUNT F SULFATE BEING LESS THAN THE EQUIVALENT OF THE BARIUM PRESENT IN THE GLUCONATE SOLUTION, AND THE CONCENTRATION OF SAID SOLUTIONS BEING SUFFICIENT TO YIELD A FINAL CONCENTRATION OF BARIUM SULFATE NOT SUBSTANTIALLY LESS THAN 4% AND NOT SUBSTANTIALLY MORE THAN 12%.
Claim 2
Dependent Claim
105 words
A PROCESS FOR PREPARING COLLOIDAL AQUEOUS BARIUM SULFATE SOLUTION WHICH COMPRISES ADDING AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SULFATE SELECTED FROM THE CLASS CONSISTING OF SULFATES OF ALKALI METALS AND MONOVALENT INORGANIC NITROGEN BASES HAVING A MOLECULAR WEIGHT OF NOT MORE THAN 40, TO AN AQUEOUS SOLUTION OF BARIUM GLUCONATE WHILE AVOIDING FORMATION OF A LOCALIZED EXCESS OF UNREACTED SULFATE IONS, THE AMOUNT F SULFATE BEING LESS THAN THE EQUIVALENT OF THE BARIUM PRESENT IN THE GLUCONATE SOLUTION, AND THE CONCENTRATION OF SAID SOLUTIONS BEING SUFFICIENT TO YIELD A FINAL CONCENTRATION OF BARIUM SULFATE NOT SUBSTANTIALLY LESS THAN 4% AND NOT SUBSTANTIALLY MORE THAN 12%.
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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |