Patent US3153028A successfully refreshed from Google Patents.
US3153028A
Expired / Lapsed
US
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Preparation of xylene modified polyethylene
Assignee: Union Carbide Corp
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Filing: 1961-04-12
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Granted: 1964-10-13
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Expires: 1981-04-12
Abstract
No abstract record available.
Inventors
- 👤 William J Tabar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:58
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A CONTINUOUS PROCESS FOR PRODUCING XYLENE MODIFIED POLYETHYLENE WHICH COMPRISES HEATING POLYETHYLENE HAVING A MOLECULAR WEIGHT OF AT LEAST 10000, AND A DENSITY OF FROM ABOUT 0.910 TO ABOUT 0.960, IN THE PRESENCE OF XYLENE AT A TEMPERATURE OF FROM ABOT 250*C. TO ABOUT 400*C. UNDER AUTOGENOUS PRESSURE FOR A PERIOD OF FROM ABOUT 0.25 MINUTE TO ABOUT 10 MINUTES.
Claim 2
Dependent Claim
60 words
A CONTINUOUS PROCESS FOR PRODUCING XYLENE MODIFIED POLYETHYLENE WHICH COMPRISES HEATING POLYETHYLENE HAVING A MOLECULAR WEIGHT OF AT LEAST 10000, AND A DENSITY OF FROM ABOUT 0.910 TO ABOUT 0.960, IN THE PRESENCE OF XYLENE AT A TEMPERATURE OF FROM ABOT 250*C. TO ABOUT 400*C. UNDER AUTOGENOUS PRESSURE FOR A PERIOD OF FROM ABOUT 0.25 MINUTE TO ABOUT 10 MINUTES.
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |