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US2687408A
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Aqueous polymerization with a phosphate suspending agent and a buffer
Assignee: Beazer East Inc
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Filing: 1951-10-03
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Granted: 1954-08-24
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Expires: 1971-10-03
Abstract
No abstract record available.
Inventors
- 👤 Grim John Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:28
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18; Y; Y10; Y10S; Y10S526/00; Y10S526/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A PROCESS FOR PREPARING POLYMER BEADS COMPRISING POLYMERIZING A POLYMERIZABLE COMPOSITION COMPRISING AT LEAST ONE ETHYLENIC MONOMER WHILE SAID POLYMERIZABLE COMPOSITION IS SUSPENDED IN WATER, SAID WATER SUSPENSION BEING STABILIZED DURING THE POLYMERIZATION BY MEANS, OF A FINELY DIVIDED PHOSPHATE DIFFICULTY SOLUBLE IN WATER AND CONTAINING AT LEAST THREE EQUIVALENTS OF A METAL THE CARBONATE OF WHICH IS ONLY SLIGHTLY SOLUBLE IN WATER SAID POLYMERIZATION BEING CATALYZED BY A PEROXIDE CATALYST, THE IMPROVEMENT COMPRISING MAINTAINING THE PH OF SAID SUSPENSION BETWEEN APPROXIMATELY 6 AND 9 BY THE ADDITION OF A BUFFER CHOSEN FROM THE CLASS CONSISTING OF THE OXIDES AND HYDROXIDES OF A METAL CHOSEN FROM THE CLASS CONSISTING OF MAGNESIUM, CALCIUM, BARIUM, AND ZINC, IN WHICH SUSPENSION THE RATIO IN PARTS BY WEIGHT OF SAID POLYMERIZABLE COMPOSITION OF WATER IS NO MORE THAN 3:1.
Claim 2
Dependent Claim
136 words
IN A PROCESS FOR PREPARING POLYMER BEADS COMPRISING POLYMERIZING A POLYMERIZABLE COMPOSITION COMPRISING AT LEAST ONE ETHYLENIC MONOMER WHILE SAID POLYMERIZABLE COMPOSITION IS SUSPENDED IN WATER, SAID WATER SUSPENSION BEING STABILIZED DURING THE POLYMERIZATION BY MEANS, OF A FINELY DIVIDED PHOSPHATE DIFFICULTY SOLUBLE IN WATER AND CONTAINING AT LEAST THREE EQUIVALENTS OF A METAL THE CARBONATE OF WHICH IS ONLY SLIGHTLY SOLUBLE IN WATER SAID POLYMERIZATION BEING CATALYZED BY A PEROXIDE CATALYST, THE IMPROVEMENT COMPRISING MAINTAINING THE PH OF SAID SUSPENSION BETWEEN APPROXIMATELY 6 AND 9 BY THE ADDITION OF A BUFFER CHOSEN FROM THE CLASS CONSISTING OF THE OXIDES AND HYDROXIDES OF A METAL CHOSEN FROM THE CLASS CONSISTING OF MAGNESIUM, CALCIUM, BARIUM, AND ZINC, IN WHICH SUSPENSION THE RATIO IN PARTS BY WEIGHT OF SAID POLYMERIZABLE COMPOSITION OF WATER IS NO MORE THAN 3:1.
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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |