US3565737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite plastic sheet and method for the preparation thereof
Assignee: Dow Chemical Co
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Filing: 1965-11-26
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Granted: 1971-02-23
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Expires: 1985-11-26
Abstract
Abstract PACKAGING FILM HAVING CONTROLLED CLING IS PREPARED BY SIMULTANEOUSLY EXTRUDING A STREAM WHICH FORMS THE MAJOR BODY OF THE FILM AND INCORPORATING THEREIN MINOR PORTIONS OF A DIFFERENT THERMOPLASTIC MATERIAL IN SUCH A WAY THAT THE MINOR PORTIONS ARE SELECTIVELY DISPOSED ADJACENT AT LEAST ONE SURFACE OF THE FILM. D R A W I N G
Inventors
- 👤 Lloyd E Lefevre
- 👤 John R Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
B; B65; B65D; B65D65/00; B65D65/38; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/19; B29C48/20; B29C48/12; B29C48/22; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072; Y; Y10; Y10T; Y10T428/00; Y10T428/19; Y10T428/192; Y10T428/195; Y10T428/22; Y10T428/24; Y10T428/24479; Y10T428/24521; Y10T428/24529
Claims Analysis
Total Claims: 0
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |