US2857352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyethylene-wax blends
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-05-15
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Granted: 1958-10-21
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Expires: 1973-05-15
Abstract
No abstract record available.
Inventors
- 👤 Lewis D Etherington
- 👤 Raymond G Newberg
- 👤 Howard L Wilson
- 👤 Andrew F Sayko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:08
CPC Classifications
C; C08; C08L; C08L91/00; C08L91/06; C08L91/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR THE PRODUCTION OF POLYETHYLENE-WAX BLENDS WHICH COMPRISES SUBJECTING ETHYLENE TO POLYMERIZATION AT A TEMPERATURE OF ABOUT 70 TO 225*C. AND A PRESSURE OF 1500 TO 30,000 P.S.I.G. IN THE PRESENCE OF A REACTION MEDIUM CONSISTING ESSENTIALLY OF BENZENE UNTIL POLYMERIZATION IS SUBSTANTIALLY COMPLETE, THEREAZFTER ADDING MOLTEN PETROLEUM WAX AND SUBSTANTIALLY REMOVING SAID BENZENE IN THE PRESENCE OF SAID PETROLEUM WAX AT A TEMPERATURE OF ABOUT 60 TO 150*C.
Claim 2
Dependent Claim
71 words
A PROCESS FOR THE PRODUCTION OF POLYETHYLENE-WAX BLENDS WHICH COMPRISES SUBJECTING ETHYLENE TO POLYMERIZATION AT A TEMPERATURE OF ABOUT 70 TO 225*C. AND A PRESSURE OF 1500 TO 30,000 P.S.I.G. IN THE PRESENCE OF A REACTION MEDIUM CONSISTING ESSENTIALLY OF BENZENE UNTIL POLYMERIZATION IS SUBSTANTIALLY COMPLETE, THEREAZFTER ADDING MOLTEN PETROLEUM WAX AND SUBSTANTIALLY REMOVING SAID BENZENE IN THE PRESENCE OF SAID PETROLEUM WAX AT A TEMPERATURE OF ABOUT 60 TO 150*C.
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |