Patent US2776274A successfully refreshed from Google Patents.
US2776274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene refining
Assignee: —
•
Filing: —
•
Granted: 1957-01-01
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Expires: 1974-01-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:09
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/16; B; B29; B29B; B29B17/00; B29B17/02; B29C; B29C48/00; B29C48/03; B29K; B29K2023/00; B29K2023/04; B29K2023/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A PROCESS FOR REFINING POLYETHYLENE WHICH COMPRISES SUBJECTING POLYETHYLENE TO INTENSIVE MIXING IN AN ENCLOSED CHAMBER UNDER POSITIVE PRESSURE, SAID MIXING ACTION BEING APPLIED BY A PLURALITY OF, SPIRALLY SHAPED ROTATING MEMBERS WHICH TURN AT DIFFERENT PERIPHERAL SPEEDS, SAID INTENSIVE MIXING BEING RESTRICTED TO THE FOLLOWING CYCLE: (1) MIXING THE POLYETHYLENE AT 20 TO 30 P.S.I. FOR NO MORE THAN 2 MINUTES WITH THE FASTER ROTATING MEMBER REVOLVING AT A PERIPHERAL SPEED OF 200 TO 285 FEET PER MINUTE, (2) CONTINUING THE MIXING AT NO MORE THAN 5 P.S.I. AND A PERIPHERAL SPEED OF THE FASTER ROTATING MEMBER OF 200 TO 285 FEET PER MINUTE, THE ROTATING MEMBERS AND THE WALLS OF THE ENCLOSED CHAMBER BEING COOLED THROUGHOUT THE MIXING CYCLE BY CIRCULATION OF WATER AT A TEMPERATURE OF 35 TO 80*F. THERETHROUGH, THE ENTIRE CYCLE HAVING A DURATION OF AT LEAST 5 MINUTES, SAID PRECESS RESULTING IN A SUBSTANTIALLY COMPLETE REMOVAL OF FISHEYES FROM THE POLYETHYLENE.
Claim 2
Dependent Claim
157 words
A PROCESS FOR REFINING POLYETHYLENE WHICH COMPRISES SUBJECTING POLYETHYLENE TO INTENSIVE MIXING IN AN ENCLOSED CHAMBER UNDER POSITIVE PRESSURE, SAID MIXING ACTION BEING APPLIED BY A PLURALITY OF, SPIRALLY SHAPED ROTATING MEMBERS WHICH TURN AT DIFFERENT PERIPHERAL SPEEDS, SAID INTENSIVE MIXING BEING RESTRICTED TO THE FOLLOWING CYCLE: (1) MIXING THE POLYETHYLENE AT 20 TO 30 P.S.I. FOR NO MORE THAN 2 MINUTES WITH THE FASTER ROTATING MEMBER REVOLVING AT A PERIPHERAL SPEED OF 200 TO 285 FEET PER MINUTE, (2) CONTINUING THE MIXING AT NO MORE THAN 5 P.S.I. AND A PERIPHERAL SPEED OF THE FASTER ROTATING MEMBER OF 200 TO 285 FEET PER MINUTE, THE ROTATING MEMBERS AND THE WALLS OF THE ENCLOSED CHAMBER BEING COOLED THROUGHOUT THE MIXING CYCLE BY CIRCULATION OF WATER AT A TEMPERATURE OF 35 TO 80*F. THERETHROUGH, THE ENTIRE CYCLE HAVING A DURATION OF AT LEAST 5 MINUTES, SAID PRECESS RESULTING IN A SUBSTANTIALLY COMPLETE REMOVAL OF FISHEYES FROM THE POLYETHYLENE.
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) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |