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US3261900A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for enhancing the clarity and gloss of polyethylene film

Assignee: Dow Chemical Co
•
Filing: 1962-10-24
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Granted: 1966-07-19
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Expires: 1982-10-24
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Abstract

No abstract record available.

Inventors

  • 👤 Frank W Spillers

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 21:54
CPC Classifications
C; C08; C08F; C08F8/00; B; B29; B29B; B29B9/00; B29B9/02; B29B9/04; B29B9/16; B29D; B29D7/00; B29D7/01; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; B29K; B29K2023/00; B29K2023/04; B29K2023/06

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 127 words
A METHOD FOR ENHANCING THE CLARITY AND GLOSS OF POLYETHLENE FILM WHILE LOWERING HAZE, SLIP AND BLOCK COMPRISING ADMIXING RAW POLYETHYLENE WITH AN ANTIOXIDANT, OF FORMING SAID ADMIXED POLYETHLENE INTO DISCRETE SHAPES, PASSING SAID SHAPES THROUGH TWO ADJACENT ROLLS, SAID ROLLS OPERATING AT DIFFERENT PERIPHERAL SPEEDS AT A RATIO BETWEEN 1:1 TO 10:1 AND AT A TEMPERATURE BETWEEN-70* C. AND THE MELTING POINT OF SAID POLYTHLENE AND WITH A SPACING BETWEEN THE PERIPHERAL SURFACE THEREOF TO CAUSE PARTIAL FLATTENING OF SAID DISCRETE SHAPES, SUBSEQUENTLY CHOPPING SAID FLATTENED SHAPES TO PRODUCE SMALLER PARTICLES, THEN MIXING SAID PARTICLES WITH 0.05 TO 3% OF A METAL SALT OF A MEMBER OF THE GROUP CONSISTING OF THE SATURATED AND THE UNSATURATED FATTY ACIDS, GRANULATING SAID MIXTURE, AND THEN FORMING FILM THEREFROM.
Claim 2
Independent Claim 127 words
A METHOD FOR ENHANCING THE CLARITY AND GLOSS OF POLYETHLENE FILM WHILE LOWERING HAZE, SLIP AND BLOCK COMPRISING ADMIXING RAW POLYETHYLENE WITH AN ANTIOXIDANT, OF FORMING SAID ADMIXED POLYETHLENE INTO DISCRETE SHAPES, PASSING SAID SHAPES THROUGH TWO ADJACENT ROLLS, SAID ROLLS OPERATING AT DIFFERENT PERIPHERAL SPEEDS AT A RATIO BETWEEN 1:1 TO 10:1 AND AT A TEMPERATURE BETWEEN-70* C. AND THE MELTING POINT OF SAID POLYTHLENE AND WITH A SPACING BETWEEN THE PERIPHERAL SURFACE THEREOF TO CAUSE PARTIAL FLATTENING OF SAID DISCRETE SHAPES, SUBSEQUENTLY CHOPPING SAID FLATTENED SHAPES TO PRODUCE SMALLER PARTICLES, THEN MIXING SAID PARTICLES WITH 0.05 TO 3% OF A METAL SALT OF A MEMBER OF THE GROUP CONSISTING OF THE SATURATED AND THE UNSATURATED FATTY ACIDS, GRANULATING SAID MIXTURE, AND THEN FORMING FILM THEREFROM.

References Cited (Backward Citations)

GB567358A Cited
US2462331A Cited
US2586820A Cited
US3165505A Cited
US2920349A Cited
US3007207A Cited
US3030330A Cited
US3036340A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-07-18 1970-01-17 1970-07-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-07-18 1974-01-17 1974-07-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-07-18 1978-01-17 1978-07-19 $7700.00 Window Closed / Lapsed

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