Patent US2789099A successfully refreshed from Google Patents.
US2789099A
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Polymerization of acrylic acid in aqueous solution
Assignee: Union Carbide Corp
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Filing: 1953-09-04
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Granted: 1957-04-16
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Expires: 1973-09-04
Abstract
No abstract record available.
Inventors
- 👤 Howard M Rife
- 👤 Alexander H Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:50
CPC Classifications
C; C08; C08F; C08F120/00; C08F120/02; C08F120/04; C08F120/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
PROCESS FOR THE PREPARATION OF STABLE AQUEOUS SOLUTIONS OF POLYACRYLIC ACID WHICH COMPRISES POLYMERIZING ACRYLIC ACID MONOMER IN AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE PEROXIDE CATALYST AND A SMALL AMOUNT OF POLYMERIZATION CONTROL AGENT CONSISTING OF WATER-SOLUBLE CUPRIC SALTS SELECTED FROM THE GROUP CONSISTING OF CUPRIC ACETATE MONOHYDRATE, CUPRIC LACTATE, CUPRIC FORMATE, CUPRIC CHLORIDE, CUPRIC SULFATE, CUPRIC NITRATE AND CUPRIC SELENATE AND WATER-SOLUBLE ALKALI METAL HYPOPHOSPHITES, SAID AMOUNT BEING AT LEAST 0.05% BY WEIGHT OF THE MONOMER IN THE INSTANCE OF THE CUPRIC SALTS AND AT LEAST 0.1% BY WEIGHT OF THE MONOMER IN THE INSTANCE OF THE HYPOPHOSPHITES.
Claim 2
Dependent Claim
99 words
PROCESS FOR THE PREPARATION OF STABLE AQUEOUS SOLUTIONS OF POLYACRYLIC ACID WHICH COMPRISES POLYMERIZING ACRYLIC ACID MONOMER IN AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE PEROXIDE CATALYST AND A SMALL AMOUNT OF POLYMERIZATION CONTROL AGENT CONSISTING OF WATER-SOLUBLE CUPRIC SALTS SELECTED FROM THE GROUP CONSISTING OF CUPRIC ACETATE MONOHYDRATE, CUPRIC LACTATE, CUPRIC FORMATE, CUPRIC CHLORIDE, CUPRIC SULFATE, CUPRIC NITRATE AND CUPRIC SELENATE AND WATER-SOLUBLE ALKALI METAL HYPOPHOSPHITES, SAID AMOUNT BEING AT LEAST 0.05% BY WEIGHT OF THE MONOMER IN THE INSTANCE OF THE CUPRIC SALTS AND AT LEAST 0.1% BY WEIGHT OF THE MONOMER IN THE INSTANCE OF THE HYPOPHOSPHITES.
References Cited (Backward Citations)
US2289540A
Cited
US2383425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |