US3123589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of styrene sulfonic acid
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:59
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A POLYMERIZATION PROCESS WHICH CONSISTS ESSENTIALLY OF THE STEPS OF CONTACTING A DRY, AR-SULFONATED STYRENE MONOMER SELECTED FROM THE GROUP OF STYRENE SULFONIC ACIDS AND THE ALKALI METAL SALTS THEREOF WITH GASEOUS OXYGEN FOR A PERIOD OF TIME SUFFICIENT TO PROVIDE A PARTIALLY OXYGENATED COMPOSITION OF WHICH AN AVERAGE SAMPLE, IN THE ABSENCE OF FREE OXYGEN, EXHIBITS A POLAROGRAM HAVING A WAVE AMPLITUDE OF AT LEAST 0.01 MICROAMPERE AT A HALF-WAVE POTENTIAL OF -0.2 VOLT PER GRAM OF THE PARTIALLY OXYGENATED AR-SULFONATED STYRENE IN 50 MILLILITERS OF SUPPORTING ELECTROLYTE, DISSOLVING A SUFFICIENT QUANTITY OF THE PARTIALLY OXYGENATED AR-SULFONATED STYRENE IN WATER TO PRODUCE A SOLUTION CONTAINING FRM ABOUT 5 TO ABOUT 35 PERCENT BY WEIGHT OF SAID SULFONATED STYRENE, REMOVING FREE OXYGEN FROM THE AQUEOUS SOLUTION AT A PH LESS THAN ABOUT 10 IN AN OXYGEN-FREE ENVIRONMENT FOR A PERIOD OF TIME SUFFICIENT TO ACHIEVE A DESIRED CONVERSION OF THE AR-SULFONATED STYRENE MONOMER INTO A POLYMERIC MATERIAL.
Claim 2
Dependent Claim
157 words
A POLYMERIZATION PROCESS WHICH CONSISTS ESSENTIALLY OF THE STEPS OF CONTACTING A DRY, AR-SULFONATED STYRENE MONOMER SELECTED FROM THE GROUP OF STYRENE SULFONIC ACIDS AND THE ALKALI METAL SALTS THEREOF WITH GASEOUS OXYGEN FOR A PERIOD OF TIME SUFFICIENT TO PROVIDE A PARTIALLY OXYGENATED COMPOSITION OF WHICH AN AVERAGE SAMPLE, IN THE ABSENCE OF FREE OXYGEN, EXHIBITS A POLAROGRAM HAVING A WAVE AMPLITUDE OF AT LEAST 0.01 MICROAMPERE AT A HALF-WAVE POTENTIAL OF -0.2 VOLT PER GRAM OF THE PARTIALLY OXYGENATED AR-SULFONATED STYRENE IN 50 MILLILITERS OF SUPPORTING ELECTROLYTE, DISSOLVING A SUFFICIENT QUANTITY OF THE PARTIALLY OXYGENATED AR-SULFONATED STYRENE IN WATER TO PRODUCE A SOLUTION CONTAINING FRM ABOUT 5 TO ABOUT 35 PERCENT BY WEIGHT OF SAID SULFONATED STYRENE, REMOVING FREE OXYGEN FROM THE AQUEOUS SOLUTION AT A PH LESS THAN ABOUT 10 IN AN OXYGEN-FREE ENVIRONMENT FOR A PERIOD OF TIME SUFFICIENT TO ACHIEVE A DESIRED CONVERSION OF THE AR-SULFONATED STYRENE MONOMER INTO A POLYMERIC MATERIAL.
References Cited (Backward Citations)
US2837500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |