US3801429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer plastic articles
Assignee: Dow Chemical Co
•
Filing: 1971-10-04
•
Granted: 1974-04-02
•
Expires: 1991-10-04
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 shaped into a desired configuration having a plurality of layers generally adjacent to a major surface thereof. Under certain conditions, irridescent products are obtained without the use of pigment.
Inventors
- 👤 W Schrenk
- 👤 D Chisholm
- 👤 K Cleereman
- 👤 Alfrey Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:23
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/03; B29C48/06; B29C48/09; B29C48/10; B29C48/16; B29C48/17; B29C48/175; B29C48/18; B29C48/185; B29C48/19; B29C48/21; B29C48/22; B29C48/305; B29C48/307; B29C48/05; B29C48/07; B29C48/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2973; Y10T428/2978; Y10T428/298; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |