Patent US3201380A successfully refreshed from Google Patents.
US3201380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyethylene
Assignee: BASF SE
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Filing: 1961-09-12
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Granted: 1965-08-17
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Expires: 1981-09-12
Abstract
No abstract record available.
Inventors
- 👤 Schmidt-Thomee George
- 👤 Eilbracht Hans
- 👤 Kinkel Klaus
- 👤 Trieschmann Hans Georg
- 👤 Urban Friedrich
- 👤 Zoche Guenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:30
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PRODUCTION OF POLYETHYLENE HAVING A DENSITY ABOVE 0.924 WHICH COMPRISES POLYMERIZING ETHYLENE IN THE ABSENCE OF SOLVENTS AT A PRESSURE BETWEEN 2000 AND 4000 ATMOSPHERES AND A TEMPERATURE BETWEEN 200* C. AND 300*C. IN THE PRESENCE OF 0.05 TO 0.2 PERCENT BY WEIGHT, WITH REFERENCE TO THE ETHYLENE OF HYDROGEN AS REGULATOR AND 5-20 P.P.M. OF 02, BASED ON THE ETHYLENE AS THE SOLE CATALYST, AND RECOVERING POLYETHYLENE HAVING A DENSITY ABOVE 0.924, SAID POLYETHYLENE BEING ADAPTED FOR PROCESSING INTO FILMS WITH HIGH CLARITY AND TRANSPARENCY.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE PRODUCTION OF POLYETHYLENE HAVING A DENSITY ABOVE 0.924 WHICH COMPRISES POLYMERIZING ETHYLENE IN THE ABSENCE OF SOLVENTS AT A PRESSURE BETWEEN 2000 AND 4000 ATMOSPHERES AND A TEMPERATURE BETWEEN 200* C. AND 300*C. IN THE PRESENCE OF 0.05 TO 0.2 PERCENT BY WEIGHT, WITH REFERENCE TO THE ETHYLENE OF HYDROGEN AS REGULATOR AND 5-20 P.P.M. OF 02, BASED ON THE ETHYLENE AS THE SOLE CATALYST, AND RECOVERING POLYETHYLENE HAVING A DENSITY ABOVE 0.924, SAID POLYETHYLENE BEING ADAPTED FOR PROCESSING INTO FILMS WITH HIGH CLARITY AND TRANSPARENCY.
References Cited (Backward Citations)
US2387755A
Cited
US2865903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |