US2910460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous polyethylene
Assignee: Individual
•
Filing: 1955-12-27
•
Granted: 1959-10-27
•
Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 Robert S Aries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:54
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/04; C08F8/00; C08F8/50; C08J; C08J3/00; C08J3/28; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; Y; Y10; Y10S; Y10S526/00; Y10S526/914
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
THE PROCESS FOR FRACTIONATING POLYETHYLENE HAVING A RATIO OF WEIGHT AVERAGE MOLECULAR WEIGHT TO NUMBER AVERAGE MOLECULAR WEIGHT OF LESS THAN ABOUT 4, WHICH COMPRISES DISSOLVING IN LIQUID XYLENE POLYETHYLENE HAVING A WEIGHT AVERAGE MOLECULAR WEIGHT TO NUMBER AVERAGE MOLECULAR WEIGHT RATIO GREATER TO NUMBER AVERAGE MOLECULAR WEIGHT RATIO GREATER THAN ABOUT 4, A NUMBER AVERGE MOLECULAR WEIGHT IN EXCESS OF ABOUT 4, A NUMBER A MELTING POINT IN EXCESS OF ABOUT 125*C. ADDING TO SAID SOLUTION A VOLATION LIQUID NON-SOLVENT FOR SAID POLYETHYLENE WHICH LIQUID IS SOLUBLE IN XYLENE, SAID LIQUID BEING ADDED IN QUANTITY SUFFICIENT TO PRECIPITATE A FIRST FRACTION OF SAID POLYETHYLENE, COOLING THE SOLUTION AND SEPARATING THE PRECIPITATE FIRST FRACTION ADDING FURTHER LIQUID TO THE SOLUTION TO PRECIPITATE A SECOND FRACTION OF POLYETHYLENE WHILE LEAVING A THIRD FRACTION IN SAID SECOND FRACTION, AND SEPARATELY HEATING SAID PRECIPITATED POLYETHLENE FRACTIONS TO DRIVE OFF ANY AXYLENE AND VOLATILE LIQUID NON-SOLVENT ADHERING THERETO.
Claim 2
Dependent Claim
154 words
THE PROCESS FOR FRACTIONATING POLYETHYLENE HAVING A RATIO OF WEIGHT AVERAGE MOLECULAR WEIGHT TO NUMBER AVERAGE MOLECULAR WEIGHT OF LESS THAN ABOUT 4, WHICH COMPRISES DISSOLVING IN LIQUID XYLENE POLYETHYLENE HAVING A WEIGHT AVERAGE MOLECULAR WEIGHT TO NUMBER AVERAGE MOLECULAR WEIGHT RATIO GREATER TO NUMBER AVERAGE MOLECULAR WEIGHT RATIO GREATER THAN ABOUT 4, A NUMBER AVERGE MOLECULAR WEIGHT IN EXCESS OF ABOUT 4, A NUMBER A MELTING POINT IN EXCESS OF ABOUT 125*C. ADDING TO SAID SOLUTION A VOLATION LIQUID NON-SOLVENT FOR SAID POLYETHYLENE WHICH LIQUID IS SOLUBLE IN XYLENE, SAID LIQUID BEING ADDED IN QUANTITY SUFFICIENT TO PRECIPITATE A FIRST FRACTION OF SAID POLYETHYLENE, COOLING THE SOLUTION AND SEPARATING THE PRECIPITATE FIRST FRACTION ADDING FURTHER LIQUID TO THE SOLUTION TO PRECIPITATE A SECOND FRACTION OF POLYETHYLENE WHILE LEAVING A THIRD FRACTION IN SAID SECOND FRACTION, AND SEPARATELY HEATING SAID PRECIPITATED POLYETHLENE FRACTIONS TO DRIVE OFF ANY AXYLENE AND VOLATILE LIQUID NON-SOLVENT ADHERING THERETO.
Claim 3
Dependent Claim
13 words
THE PROCESS DEFINED IN CLAIM 1, WHEREIN SAID VOLATILE LIQUID NON-SOLVENT COMPRISES PROPANOL.
References Cited (Backward Citations)
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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) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |