Patent US2112513A successfully refreshed from Google Patents.
US3077428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealable polyethylene laminate and method of making same
Assignee: Union Carbide Corp
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Filing: 1956-06-29
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Granted: 1963-02-12
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Expires: 1976-06-29
Abstract
No abstract record available.
Inventors
- 👤 Rhoda C K Heuser
- 👤 Walter A Haine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:50
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31888; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
METHOD FOR FORMING A POLYETHYLENE FILM HAVING ONE SURFACE CHARACTERIZED BY HEAT-SEALABILITY TO A POLYETHYLENE SURFACE AND THE OTHER SURFACE BY ADHESIVENESS TO A NONPOLYETHENIC SUBSTRATE WHICH COMPRISES EXTRUDING POLYETHYLENE AS A FILM, IMMEDIATELY BLANKETING WITH AN INERT GAS THAT SURFACE OF THE FILM WHICH IS TO BE HEAT-SEALABLE AS IT EMERGES FROM THE EXTRUDER AND UNTIL IT HAS COOLED BELOW ITS HEAT-DEGRADATION TEMPERATURE WHILE SIMULTANEOULSY EXPOSING THE OTHER SURFACE WHICH IS TO ADHERE TO A NON-POLYETHYLENIC SUBSTRATE TO AN OXYGEN CONTAINING ATMOSPHERE.
Claim 2
Dependent Claim
83 words
METHOD FOR FORMING A POLYETHYLENE FILM HAVING ONE SURFACE CHARACTERIZED BY HEAT-SEALABILITY TO A POLYETHYLENE SURFACE AND THE OTHER SURFACE BY ADHESIVENESS TO A NONPOLYETHENIC SUBSTRATE WHICH COMPRISES EXTRUDING POLYETHYLENE AS A FILM, IMMEDIATELY BLANKETING WITH AN INERT GAS THAT SURFACE OF THE FILM WHICH IS TO BE HEAT-SEALABLE AS IT EMERGES FROM THE EXTRUDER AND UNTIL IT HAS COOLED BELOW ITS HEAT-DEGRADATION TEMPERATURE WHILE SIMULTANEOULSY EXPOSING THE OTHER SURFACE WHICH IS TO ADHERE TO A NON-POLYETHYLENIC SUBSTRATE TO AN OXYGEN CONTAINING ATMOSPHERE.
Claim 3
Dependent Claim
67 words
A LAMINATE COMPRISING A NONPOLYETHLENIC SUBSTRATE AND A POLYETHYLENE FILM, ONE SURFACE OF WHICH WAS AT LEAST PARTLY OXIDIZED AND IS HEAT AND PRESSURE BONDED TO SAID NONPOLYETHYLENIC SUBSTRATE, AND WHEREIN THE OTHER SURFACE OF SAID POLYETHYLENE FILM WAS KEPT UNOXIDIZED AND THEREBY HEAT-SEALABLE BY CONTINUOUS MAINTENANCE IN AN INERT GAS FROM THE TIME OF EXTRUSION TO COOLING TO BELOW THE LATE DEGRADATION TEMPERATURE OF THE POLYETHYLENE.
Claim 4
Dependent Claim
67 words
A LAMINATE COMPRISING A NONPOLYETHLENIC SUBSTRATE AND A POLYETHYLENE FILM, ONE SURFACE OF WHICH WAS AT LEAST PARTLY OXIDIZED AND IS HEAT AND PRESSURE BONDED TO SAID NONPOLYETHYLENIC SUBSTRATE, AND WHEREIN THE OTHER SURFACE OF SAID POLYETHYLENE FILM WAS KEPT UNOXIDIZED AND THEREBY HEAT-SEALABLE BY CONTINUOUS MAINTENANCE IN AN INERT GAS FROM THE TIME OF EXTRUSION TO COOLING TO BELOW THE LATE DEGRADATION TEMPERATURE OF THE POLYETHYLENE.
References Cited (Backward Citations)
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Cited
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US2715088A
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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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |