Patent US2980964A successfully refreshed from Google Patents.
US2980964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyethylene films of improved transparency and method of making same
Assignee: Distillers Co Yeast Ltd
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Filing: 1957-01-02
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Granted: 1961-04-25
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Expires: 1977-01-02
Abstract
No abstract record available.
Inventors
- 👤 Dilke Max Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:16
CPC Classifications
B; B29; B29C; B29C55/00; Y; Y10; Y10S; Y10S264/00; Y10S264/73; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
A PROCESS FOR THE PRODUCTION OF A LINEAR POLYETHYLENE FILM OF GOOD TRANSPARENCY WHICH COMPRISES MIXING LINEAR POLYETHYLENE, HAVING A DENSITY OF AT LEAST 0.95, WITH A COMPATIBLE INERT TRANSPARENT LIQUID TO FORM A SOLID, SUBSTANTIALLY HOMOGENEOUS COMPOSITION, FORMING THE HOMOGENEOUS COMPOSITION INTO A FILM AND PERMANENTLY STRETCHING THE FILM AT A TEMPERATURE BELOW THE SOFTENING POINT OF THE POLYETHYLENE TO GIVE THE DESIRED TRANSPARENCY.
Claim 2
Dependent Claim
65 words
A PROCESS FOR THE PRODUCTION OF A LINEAR POLYETHYLENE FILM OF GOOD TRANSPARENCY WHICH COMPRISES MIXING LINEAR POLYETHYLENE, HAVING A DENSITY OF AT LEAST 0.95, WITH A COMPATIBLE INERT TRANSPARENT LIQUID TO FORM A SOLID, SUBSTANTIALLY HOMOGENEOUS COMPOSITION, FORMING THE HOMOGENEOUS COMPOSITION INTO A FILM AND PERMANENTLY STRETCHING THE FILM AT A TEMPERATURE BELOW THE SOFTENING POINT OF THE POLYETHYLENE TO GIVE THE DESIRED TRANSPARENCY.
Claim 3
Dependent Claim
36 words
A TRANSPARENT FILM CONSISTING OF A PERMANENTLY STRETCHED SUBSTANTIALLY HOMOGENEOUS SOLID COMPOSITION, SAID COMPOSITION CONSISTING ESSENTIALLY OF LINEAR POLYETHYLENE HAVING A DENSITY OF AT LEAST 0.95 AND AN INERT LIQUID WHICH IS COMPATIBLE WITH SAID POLYETHYLENE.
Claim 4
Dependent Claim
36 words
A TRANSPARENT FILM CONSISTING OF A PERMANENTLY STRETCHED SUBSTANTIALLY HOMOGENEOUS SOLID COMPOSITION, SAID COMPOSITION CONSISTING ESSENTIALLY OF LINEAR POLYETHYLENE HAVING A DENSITY OF AT LEAST 0.95 AND AN INERT LIQUID WHICH IS COMPATIBLE WITH SAID POLYETHYLENE.
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |