Patent US2673194A successfully refreshed from Google Patents.
US2673194A
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Suspension polymerization
Assignee: Beazer East Inc
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Filing: 1951-11-09
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Granted: 1954-03-23
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Expires: 1971-11-09
Abstract
No abstract record available.
Inventors
- 👤 Grim John Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:03
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A PROCESS FOR PREPARING POLYMER BEADS COMPRISING THE STEP OF POLYMERIZING IN A STABLE, AQUEOUS SUSPENSION A POLYMERIZABLE COMPOSITION COMPRISING AT LEAST ONE POLYMERIZABLE ETHYLENIC MONOMER, SAID SUSPENSION BEING STABILIZED DURING THE POLYMERIZATION BY MEANS OF A FINELY DIVIDED PHOSPHATE, DIFFICULTLY SOLUBLE IN WATER, AND CONTAINING FOR EACH PHOSPHATE GROUP AT LEAST THREE EQUIVALENTS OF A METAL, THE CARBONATE OF WHICH IS ONLY SLIGHTLY SOLUBLE IN WATER, THE IMPROVEMENT OF EXTENDING SAID PHOSPHATE BY AN ANIONIC SURFACE-ACTIVE AGENT IN AN AMOUNT BETWEEN ABOUT 0.0005% AND 0.05% BY WEIGHT OF THE TOTAL SUSPENSION.
Claim 2
Dependent Claim
93 words
IN A PROCESS FOR PREPARING POLYMER BEADS COMPRISING THE STEP OF POLYMERIZING IN A STABLE, AQUEOUS SUSPENSION A POLYMERIZABLE COMPOSITION COMPRISING AT LEAST ONE POLYMERIZABLE ETHYLENIC MONOMER, SAID SUSPENSION BEING STABILIZED DURING THE POLYMERIZATION BY MEANS OF A FINELY DIVIDED PHOSPHATE, DIFFICULTLY SOLUBLE IN WATER, AND CONTAINING FOR EACH PHOSPHATE GROUP AT LEAST THREE EQUIVALENTS OF A METAL, THE CARBONATE OF WHICH IS ONLY SLIGHTLY SOLUBLE IN WATER, THE IMPROVEMENT OF EXTENDING SAID PHOSPHATE BY AN ANIONIC SURFACE-ACTIVE AGENT IN AN AMOUNT BETWEEN ABOUT 0.0005% AND 0.05% BY WEIGHT OF THE TOTAL SUSPENSION.
References Cited (Backward Citations)
US2524627A
Cited
US2594913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |