US2994679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polystyrene composition plasticized with pyrolyzed polyethylene and method of preparation
Assignee: Phillips Petroleum Co
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Filing: 1957-09-30
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Granted: 1961-08-01
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Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 Rufus V Jones
- 👤 Peter J Canterino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08F; C08F8/00; C08F8/50; C08L23/00; C08L23/26; C08L23/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A COMPOSITION COMPRISING A POLYSTYRENE AND A MINOR PROPORTION, SUFFICIENT TO PLASTICIZE SAID POLYSTYRENE, OF A HYDROCARBON WHICH IS A THERMAL DECOMPOSITION PRODUCT OF A POLYMER OF A 1-OLEFIN, SAID THERMAL DECOMPOSITION HAVING BEEN AT A TEMPERATURE IN THE RANGE OF 700 TO 900*F., AND SAID POLYMER HAVING BEEN PRODUCED BY POLYMERIZATION OF SAID 1-OLEFIN IN THE PRESENCE OF A POLYMERIZATION CATALYST COMPRISING CHROMIUM OXIDE AS AN ESSENTIAL INGREDIENT, SAID PRODUCT HAVING A MOLECULAR WEIGHT IN THE RANGE OF 200 TO 800 AND BEING CHARACTERIZED BY A MAJOR PROPORTION OF THE UNSATURATION BEING SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
99 words
A COMPOSITION COMPRISING A POLYSTYRENE AND A MINOR PROPORTION, SUFFICIENT TO PLASTICIZE SAID POLYSTYRENE, OF A HYDROCARBON WHICH IS A THERMAL DECOMPOSITION PRODUCT OF A POLYMER OF A 1-OLEFIN, SAID THERMAL DECOMPOSITION HAVING BEEN AT A TEMPERATURE IN THE RANGE OF 700 TO 900*F., AND SAID POLYMER HAVING BEEN PRODUCED BY POLYMERIZATION OF SAID 1-OLEFIN IN THE PRESENCE OF A POLYMERIZATION CATALYST COMPRISING CHROMIUM OXIDE AS AN ESSENTIAL INGREDIENT, SAID PRODUCT HAVING A MOLECULAR WEIGHT IN THE RANGE OF 200 TO 800 AND BEING CHARACTERIZED BY A MAJOR PROPORTION OF THE UNSATURATION BEING SELECTED FROM THE GROUP CONSISTING OF
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |