US2493965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion polymerization of styrene
Assignee: Uniroyal Inc
•
Filing: 1947-01-29
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Granted: 1950-01-10
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Expires: 1967-01-29
Abstract
No abstract record available.
Inventors
- 👤 John W Haefele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:27
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
THE METHOD OF PRODUCING A POLYSTYRENE EMULSION HAVING HIGH SOLIDS CONTENT WHICH COMPRISES HEATING A MIXTURE OF STYRENE AND PLASTICIZER THEREFOR SELECTED FROM THE GROUP CONSISTING OF DIALKYL PHTHALATES, DIARYL PHTHALATES AND TRIARYL PHOSPHATES, THE AMOUNT OF PLASTICIZER BEING OVER 20% AND UP TO 50% BASED ON THE COMBINED WEIGHT OF STYRENE AND SAID PLASTICIZER, IN WATER IN THE PRESENCE OF 1 TO 5 PARTS BY WEIGHT OF ALKALI SOAP OF LONG CHAIN FATTY ACID HAVING FROM 12 TO 24 CARBON ATOMS AND 1 GO 2.5 PARTS BY WEIGHT OF ALKALI SULFATE AND 1 TO 4.5 PARTS BY WEIGHT OF ALKALI DODECYL BENZENE SULFONATE BASED ON 100 PARTS OF COMBINED STYRENE AND SAID PLASTICIZER, AND THE COMBINED WEIGHT OF STYRENE AND SAID PLASTICIZER BEING 50 TO 65% OF THE TOTAL WEIGHT OF THE LIQUID SYSTEM.
Claim 2
Independent Claim
135 words
THE METHOD OF PRODUCING A POLYSTYRENE EMULSION HAVING HIGH SOLIDS CONTENT WHICH COMPRISES HEATING A MIXTURE OF STYRENE AND PLASTICIZER THEREFOR SELECTED FROM THE GROUP CONSISTING OF DIALKYL PHTHALATES, DIARYL PHTHALATES AND TRIARYL PHOSPHATES, THE AMOUNT OF PLASTICIZER BEING OVER 20% AND UP TO 50% BASED ON THE COMBINED WEIGHT OF STYRENE AND SAID PLASTICIZER, IN WATER IN THE PRESENCE OF 1 TO 5 PARTS BY WEIGHT OF ALKALI SOAP OF LONG CHAIN FATTY ACID HAVING FROM 12 TO 24 CARBON ATOMS AND 1 GO 2.5 PARTS BY WEIGHT OF ALKALI SULFATE AND 1 TO 4.5 PARTS BY WEIGHT OF ALKALI DODECYL BENZENE SULFONATE BASED ON 100 PARTS OF COMBINED STYRENE AND SAID PLASTICIZER, AND THE COMBINED WEIGHT OF STYRENE AND SAID PLASTICIZER BEING 50 TO 65% OF THE TOTAL WEIGHT OF THE LIQUID SYSTEM.
References Cited (Backward Citations)
US2125527A
Cited
US2388600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |