Patent US2939745A successfully refreshed from Google Patents.
Patent US3084126A successfully refreshed from Google Patents.
US3084126A
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Process of extruding a foamable styrene polymer containing an alkali metal silicate
Assignee: Monsanto Chemicals Ltd
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Filing: 1956-08-06
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Granted: 1963-04-02
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Expires: 1976-08-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank A Carlson
- 👤 Platzer Norbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:44
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08K; C08K3/00; C08K3/34; C08J2325/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR PREPARING A RESILIENT STYRENE POLYMER FOAM HAVING SUBSTANTIALLY UNIFORM CELL SIZES, THE AVERAGE DIAMETER OF WHICH IS LESS THAN ABOUT 0.02", WHICH COMPRISES EXTRUDING A MIXTURE OF 95.0-99.9 WEIGHT PERCENT OF A FOAMABLE STYRENE POLYMER COMPOSITION AND, CORRESPONDINGLY, 5.0-0.1 WEIGHT PERCENT OF AN ALKALI METAL SILICATE AT A TEMPERATURE OF 250-400*F. AND A PRESSURE OF GREATER THAN 150 P.S.I., SAID FOAMABLE STYRENE POLYMER COMPOSITION HAVING INCORPORATED THEREIN, AS A FOAMING AGENT, A LIQUID ALIPHATIC HYDROCARBON CONTAINING AT LEAST 5 CARBON ATOMS IN ITS STRUCTURE AND HAVING A BOILING POINT NOT HIGHER THAN ABOUT 80*C., SAID ALKALI METAL SILICATE HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN ABOUT 5 MICRONS.
Claim 2
Dependent Claim
112 words
A PROCESS FOR PREPARING A RESILIENT STYRENE POLYMER FOAM HAVING SUBSTANTIALLY UNIFORM CELL SIZES, THE AVERAGE DIAMETER OF WHICH IS LESS THAN ABOUT 0.02", WHICH COMPRISES EXTRUDING A MIXTURE OF 95.0-99.9 WEIGHT PERCENT OF A FOAMABLE STYRENE POLYMER COMPOSITION AND, CORRESPONDINGLY, 5.0-0.1 WEIGHT PERCENT OF AN ALKALI METAL SILICATE AT A TEMPERATURE OF 250-400*F. AND A PRESSURE OF GREATER THAN 150 P.S.I., SAID FOAMABLE STYRENE POLYMER COMPOSITION HAVING INCORPORATED THEREIN, AS A FOAMING AGENT, A LIQUID ALIPHATIC HYDROCARBON CONTAINING AT LEAST 5 CARBON ATOMS IN ITS STRUCTURE AND HAVING A BOILING POINT NOT HIGHER THAN ABOUT 80*C., SAID ALKALI METAL SILICATE HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN ABOUT 5 MICRONS.
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |