US3259595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable polystyrene compositions
Assignee: Atlantic Richfield Co
•
Filing: 1963-07-15
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Granted: 1966-07-05
•
Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 Harold A Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:47
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08J; C08J9/00; C08J9/16; C08J9/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A FOAMABLE STYRENE COPOLYMER SUITABLE FOR FORMING A CELLULAR ARTICLE POSSESSING UNIFORMLY SMALL CELLS, GOOD THERMAL STABILITY AT TEMPERATURES BETWEEN 100-150* 4C. AND HAVING A DENSITY OF ABOUT ONE POUND PER CUBIC FOOT WHICH COMPOSITION COMPRISES A COPOLYMER OF FROM 99.6-99.8 PARTS BY WEIGHT OF STYRENE AND FROM 0.4-0.2 PART BY WEIGHT OF A DIALLYL ESTER OF AN UNSATURATED ALIPHATIC DIBASIC ACID WHICH ACID CONTAINS FROM FOUR TO FIVE CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF DIALLYL ITACONATE AND DIALLYL FUMARATE, SAID COPOLYMER BEING SOLUBLE IN TOLUENE AND, SAID COPOLYMER HAVE UNIFORMLY INCORPORATED THEREIN A NORMALLY LIQUID EXPANDING AGENT.
Claim 2
Dependent Claim
100 words
A FOAMABLE STYRENE COPOLYMER SUITABLE FOR FORMING A CELLULAR ARTICLE POSSESSING UNIFORMLY SMALL CELLS, GOOD THERMAL STABILITY AT TEMPERATURES BETWEEN 100-150* 4C. AND HAVING A DENSITY OF ABOUT ONE POUND PER CUBIC FOOT WHICH COMPOSITION COMPRISES A COPOLYMER OF FROM 99.6-99.8 PARTS BY WEIGHT OF STYRENE AND FROM 0.4-0.2 PART BY WEIGHT OF A DIALLYL ESTER OF AN UNSATURATED ALIPHATIC DIBASIC ACID WHICH ACID CONTAINS FROM FOUR TO FIVE CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF DIALLYL ITACONATE AND DIALLYL FUMARATE, SAID COPOLYMER BEING SOLUBLE IN TOLUENE AND, SAID COPOLYMER HAVE UNIFORMLY INCORPORATED THEREIN A NORMALLY LIQUID EXPANDING AGENT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |