US3275715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for incorporating additives into polyolefins
Assignee: Container Corp
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Filing: 1962-12-04
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Granted: 1966-09-27
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Expires: 1982-12-04
Abstract
No abstract record available.
Inventors
- 👤 Jr John M O'leary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:46
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/2053; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR UNIFORMLY INCORPORATING A NON-GASEOUS ADDITIVE INTO A POLYOLEFIN SELECTED FROM THE GROUP CONSISTING OT POLYETHYLENE AND POLYPROPYLENE WHICH COMPRISES AGITATING FOR NOT MORE THAN TWO HOURS THE POWDERED POLYOLEFIN AT A TEMPERATURE OF BETWEEN 125*F. AND 150*F. WITH A SOLUTION OF THE ADDITIVE IN A SOLVENT WHICH IS BOTH A SOLVENT FOR THE ADDITIVE AND WHICH PENETRATES THE POLYOLEFIN POWDER GRANULES AND CAUSES THEM TO SWELL, AND WITH THE CONCENTRATION OF SAID SOLVENT BEING BELOW THAT CONCENTRATION WHICH APPRECIABLY DISSOLVES THE POWDERED POLYOLEFIN AND EFFECTS COALESCENE THEREOF, NAMELY WITHIN THE RANGE OF 1/2 TO 1 LITER OF THE SOLUTION OF THE SOLVENT AND ADDITIVE PER 100 POUNDS OF THE POLYOLEFIN.
Claim 2
Dependent Claim
113 words
A PROCESS FOR UNIFORMLY INCORPORATING A NON-GASEOUS ADDITIVE INTO A POLYOLEFIN SELECTED FROM THE GROUP CONSISTING OT POLYETHYLENE AND POLYPROPYLENE WHICH COMPRISES AGITATING FOR NOT MORE THAN TWO HOURS THE POWDERED POLYOLEFIN AT A TEMPERATURE OF BETWEEN 125*F. AND 150*F. WITH A SOLUTION OF THE ADDITIVE IN A SOLVENT WHICH IS BOTH A SOLVENT FOR THE ADDITIVE AND WHICH PENETRATES THE POLYOLEFIN POWDER GRANULES AND CAUSES THEM TO SWELL, AND WITH THE CONCENTRATION OF SAID SOLVENT BEING BELOW THAT CONCENTRATION WHICH APPRECIABLY DISSOLVES THE POWDERED POLYOLEFIN AND EFFECTS COALESCENE THEREOF, NAMELY WITHIN THE RANGE OF 1/2 TO 1 LITER OF THE SOLUTION OF THE SOLVENT AND ADDITIVE PER 100 POUNDS OF THE POLYOLEFIN.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |