Patent US3261900A successfully refreshed from Google Patents.
US3261900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for enhancing the clarity and gloss of polyethylene film
Assignee: Dow Chemical Co
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Filing: 1962-10-24
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Granted: 1966-07-19
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Expires: 1982-10-24
Abstract
No abstract record available.
Inventors
- 👤 Frank W Spillers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:57
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.
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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) | 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 |