Patent US570590A successfully refreshed from Google Patents.
US2941964A
Expired / Lapsed
US
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Composition comprising polystyrene, volatile organic solvent and a carbon dioxide liberating agent, and process of simultaneously foaming and extruding said composition
Assignee: Beazer East Inc
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Filing: 1954-11-16
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Granted: 1960-06-21
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Expires: 1974-11-16
Abstract
No abstract record available.
Inventors
- 👤 John C Houston
- 👤 John J Tress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S521/00; Y10S521/908; Y10S521/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A COMPOSITION CAPABLE OF BEING FOAMED AND EXTRUDED IN ONE OPERATION COMPRISING POLYSTYRENE PARTICLES, HAVING INTEGRATED THEREWITH FROM ABOUT FOUR AND ONE-HALF TO NINE PERCENT OF AN ALIPHATIC HYDROCARBON BOILING APPROXIMATELY IN THE RANGE 30-90*C. HOMOGENEOUSLY ADMIXED WITH A CARBON DIOXIDE LIBERATING AGENT CHOSEN FROM THE CLASS CONSISTING OF THE ALKALI AND ALKALINE EARTH CARBONATES AND BICARBONATES AND A SOLID ORGANIC ACID HAVING AT LEAST ABOUT 3.0 MILLI-EQUIVALENTS OF ACIDIC HYDROGEN PER GRAM IN AMOUNTS TO PRODUCE UPON REACTION A TOTAL OF FROM ABOUT ONE-TENTH TO FIVE PERCENT BASED ON THE POLYSTYRENE PARTICLES CONTAINING THE ALIPHATIC HYDROCARBON OF WATER AND CARBON DIOXIDE.
Claim 2
Dependent Claim
102 words
A COMPOSITION CAPABLE OF BEING FOAMED AND EXTRUDED IN ONE OPERATION COMPRISING POLYSTYRENE PARTICLES, HAVING INTEGRATED THEREWITH FROM ABOUT FOUR AND ONE-HALF TO NINE PERCENT OF AN ALIPHATIC HYDROCARBON BOILING APPROXIMATELY IN THE RANGE 30-90*C. HOMOGENEOUSLY ADMIXED WITH A CARBON DIOXIDE LIBERATING AGENT CHOSEN FROM THE CLASS CONSISTING OF THE ALKALI AND ALKALINE EARTH CARBONATES AND BICARBONATES AND A SOLID ORGANIC ACID HAVING AT LEAST ABOUT 3.0 MILLI-EQUIVALENTS OF ACIDIC HYDROGEN PER GRAM IN AMOUNTS TO PRODUCE UPON REACTION A TOTAL OF FROM ABOUT ONE-TENTH TO FIVE PERCENT BASED ON THE POLYSTYRENE PARTICLES CONTAINING THE ALIPHATIC HYDROCARBON OF WATER AND CARBON DIOXIDE.
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |