US3565985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing multilayer plastic articles
Assignee: Dow Chemical Co
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Filing: 1969-04-10
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Granted: 1971-02-23
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Expires: 1989-04-10
Abstract
Abstract MULTIPLE LAYER FILMS ARE MADE BY ARRANGING A MINIMUM OF TWO STREAMS INTO ONE STREAM HAVING A PLURALITY OF GENERALLY PARALLEL LAYERS. BY MECHANICALLY MANIPULATING THE LAYERED STREAM, AN INCREASED NUMBER OF LAYERS ARE OBTAINED AND THE MANIPULATING STREAM IS SNAPED INTO A DESIRED CONFIGURATION HAVING A PLURALITY OF LAYERS GENERALLY ADJACENT TO A MAJOR SURFACE THEROF. UNDER CERTAIN CONDITIONS, IRIDESCENT PRODUCTS ARE OBTAINED WITHOUT THE USE OF PIGMENT.
Inventors
- 👤 Walter J Schrenk
- 👤 Douglas S Chisholm
- 👤 Kenneth J Cleereman
- 👤 Turner Alfrey Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:38
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/285; G02B5/287; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/16; B29C48/17; B29C48/175; B29C48/18; B29C48/185; B29C48/19; B29C48/21; B29C48/22; B29C48/25; B29C48/30; B29C48/304; B29C48/305; B29C48/307; B29C48/32; B29C48/33; B29C48/335; B29C48/337; B29C48/05; B29C48/06; B29C48/07; B29C48/08; B29K; B29K2105/00; B29K2105/06; B29K2105/20; B29L; B29L2031/00; B29L2031/34; B29L2031/3462; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/1393; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/26; Y10T428/28
Claims Analysis
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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 |