Patent US2594913A successfully refreshed from Google Patents.
US2594913A
Expired / Lapsed
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Suspension polymerization employing phosphates of submicronic particle size
Assignee: Beazer East Inc
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Filing: 1947-11-18
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Granted: 1952-04-29
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Expires: 1967-11-18
Abstract
No abstract record available.
Inventors
- 👤 Grim John Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:09
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A PROCESS FOR PREPARING POLYMER BEADS, THE STEPS OF FORMING AN AQUEOUS SUSPENSION BY ADDING TO WATER IN ONE PORTION A POLYMERIZABLE COMPOSITION COMPRISING A POLYMERIZABLE ETHYLENIC MONOMER, STABILIZING SAID SUSPENSION BY MEANS OF FROM ABOUT 0.1% TO ABOUT 5% BY WEIGHT BASED ON THE SYSTEM OF A PHOSPHATE, DIFFICULTLY SOLUBLE IN WATER AND CONTAINING FOR EACH PHOSPHATE GROUP AT LEAST THREE EQUIVALENTS OF A METAL, THE CARBONATE OF WHICH IS AT MOST BY SLIGHTLY SOLUBLE IN WATER, SAID PHOSPHATE BEING COMPRISED OF PARTICLES PREDOMINANTLY OF A SIZE IN THE RANGE 0.2-0.005 MICRON, AND EFFECTING POLYMERIZATION OF SAID ETHYLENIC MONOMER WHILE THUS DISPERSED, IN WHICH PROCESS THE RATIO IN PARTS BY WEIGHT OF SAID ETHYLENIC MONOMER TO WATER IS NO LESS THAN 1:1.
Claim 2
Dependent Claim
124 words
IN A PROCESS FOR PREPARING POLYMER BEADS, THE STEPS OF FORMING AN AQUEOUS SUSPENSION BY ADDING TO WATER IN ONE PORTION A POLYMERIZABLE COMPOSITION COMPRISING A POLYMERIZABLE ETHYLENIC MONOMER, STABILIZING SAID SUSPENSION BY MEANS OF FROM ABOUT 0.1% TO ABOUT 5% BY WEIGHT BASED ON THE SYSTEM OF A PHOSPHATE, DIFFICULTLY SOLUBLE IN WATER AND CONTAINING FOR EACH PHOSPHATE GROUP AT LEAST THREE EQUIVALENTS OF A METAL, THE CARBONATE OF WHICH IS AT MOST BY SLIGHTLY SOLUBLE IN WATER, SAID PHOSPHATE BEING COMPRISED OF PARTICLES PREDOMINANTLY OF A SIZE IN THE RANGE 0.2-0.005 MICRON, AND EFFECTING POLYMERIZATION OF SAID ETHYLENIC MONOMER WHILE THUS DISPERSED, IN WHICH PROCESS THE RATIO IN PARTS BY WEIGHT OF SAID ETHYLENIC MONOMER TO WATER IS NO LESS THAN 1:1.
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) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |