US3344092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamable styrene polymer compositions containing a mixture of a carbonate and a bicarbonate as blowing agents
Assignee: Atlantic Richfield Co
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Filing: 1965-04-22
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Granted: 1967-09-26
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Expires: 1985-04-22
Abstract
No abstract record available.
Inventors
- 👤 Pavuk Frank Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:06
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08J2325/00; Y; Y10; Y10S; Y10S264/00; Y10S264/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF PRODUCING A FOAM STRUCTURE HAVING SMALL, UNIFORM CELLS COMPRISING: (A) HOMOGENEOUSLY ADMIXING A STYRENE POLYMER WITH A SOLID ORGANIC ACID HAVING AT LEAST ABOUT 3.0 MILLIEQUIVALENTS OF ACIDIC HYDROGEN PER GRAM AND A SYNERGISTIC CARBON DIOXIDE LIBERATING AGENT COMBINATION, SAID COMBINATION COMPRISING A BICARBONATE SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH BICARBONATES AND A CARBONATE SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH CARBONATES IN WHICH THE RATIO OF WEIGHT PERCENT CARBONATE TO BICARBONATE RANGES FROM ABOUT 1:2 TO 3:2 AND THEREAFTER (B) SIMULTANEOUSLY FOAMING AND EXTRUDING SAID MIXTURE TO PRODUCE A FOAM STRUCTURE.
Claim 2
Independent Claim
102 words
A METHOD OF PRODUCING A FOAM STRUCTURE HAVING SMALL, UNIFORM CELLS COMPRISING: (A) HOMOGENEOUSLY ADMIXING A STYRENE POLYMER WITH A SOLID ORGANIC ACID HAVING AT LEAST ABOUT 3.0 MILLIEQUIVALENTS OF ACIDIC HYDROGEN PER GRAM AND A SYNERGISTIC CARBON DIOXIDE LIBERATING AGENT COMBINATION, SAID COMBINATION COMPRISING A BICARBONATE SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH BICARBONATES AND A CARBONATE SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH CARBONATES IN WHICH THE RATIO OF WEIGHT PERCENT CARBONATE TO BICARBONATE RANGES FROM ABOUT 1:2 TO 3:2 AND THEREAFTER (B) SIMULTANEOUSLY FOAMING AND EXTRUDING SAID MIXTURE TO PRODUCE A FOAM STRUCTURE.
References Cited (Backward Citations)
US2941964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |