US3725174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polymer film polyhydric polymer film laminate
Assignee: Champion International Corp
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Filing: 1971-01-06
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Granted: 1973-04-03
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Expires: 1991-01-06
Abstract
Abstract THE LAMMINATION OF AT LEAST TWO LAYERS OF NORMALLY INCOMPATIBLE POLYMERS IS DISCLOSED. ONE OF THE POLYMERS IS A HIGHLY HYDROGEN BONDED POLYMER, SUCH AS CELLULOSE, AAND THE OTHER POLYMER IS A THERMOPLASTIC POLYMER, SUCH AS POLYETHYLENT. LAMINATION IS ACCOMPLISHED BY CONTACTING THE OPPOSING SURFACES OF THE LAYERS IN THE PRESENCE OF AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID OR ANHYDRIDE, SUCH AS MALEIC ANHYDRIDE AND A FREE RADIAL INITITAOR. THE MALEIC ANHYDRIDE THEREBY REACTS WITH THE SURFACES AND COUPLES THE TWO LAYERS TOGETHER, FORMING A BOND THEREBETWEEN.
Inventors
- 👤 N Gaylord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:58
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04; C01; C01P; C01P2004/00; C01P2004/10; C01P2004/60; C01P2004/62; C01P2004/80; Y; Y10; Y10T; Y10T428/00; Y10T428/31; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31909; Y10T428/31928; Y10T428/8305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |