US3647612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer plastic articles
Assignee: Dow Chemical Co
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Filing: 1970-09-15
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Granted: 1972-03-07
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Expires: 1990-09-15
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 MANIUPLATING STREAM IS SHAPED INTO A DESIRED CONFIGURATION HAVING A PLURALITY OF LAYERS GENERALLY ADJACENT TO A MAJOR SURFACE THEREOF. UNDER CERTAIN CONDKTIONS, 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
2026-11-09 07:27
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/03; B29C48/06; B29C48/09; B29C48/16; B29C48/17; B29C48/175; B29C48/305; B29C48/307; B29C48/05; B29C48/07; B29C48/08; B29C48/10; B29C48/18; B29C48/185; B29C48/21; B29C48/22; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/269
Claims Analysis
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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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |