US3573152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic elongated cellular products
Assignee: Huntsman Chemical Corp
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Filing: 1969-07-29
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Granted: 1971-03-30
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Expires: 1989-07-29
Abstract
Abstract INTEGRAL FOAM OBJECTS COMPOSED OF A PLURALITY OF FUSED STRANDS HAVING A DENSITY OF 4 POUNDS PER CUBIC FOOT OR LESS ARE PREPARED BY EXTRUDING A FOAMABLE THERMOPLASTIC MATERIAL THROUGH A MULTI-ORIFICE DIE PLATE WHEREBY THE INDIVIDUAL FOAMABLE ELEMENTS IN STRAND FORM ARE SIMULTANEOUSLY EXPANDED AND FUSED OR COALESCED UPON EMERGING FROM THE DIE ORIFICES. PRODUCTS OF ANY DESIRED CONFIGURATION MAY BE PRODUCED BY PLACING A SUITABLE FORMER ADJACENT TO THE DIE. THESE FOAMABLE THERMOPLASTIC PRODUCTS MAY BE POLYSTYRENE, POLYETHYLENE, OR ANY OF THE KNOWN THERMOPLASTICS INTO WHICH A NON-SOLVENT BLOWING OR EXPANDING AGENT IS INCORPORATED PRIOR TO EXTRUSION.
Inventors
- 👤 Fred E Wiley
- 👤 Frederick D De Bell
- 👤 John M De Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:43
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/468; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24132; Y10T428/24942; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/31504; Y10T428/31855; Y10T428/31931; Y10T442/00; Y10T442/60; Y10T442/643
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |