US3608145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making a plastic extrudate having unblown outer portion and integral blown portion
Assignee: UNIROYAL PLASTICS COMPANY Inc WORLD HEADQUARTERS MIDDLEBURY CT 06749 A CORP OF
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Filing: 1969-07-15
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Granted: 1971-09-28
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Expires: 1989-07-15
Abstract
Abstract A DIE AND METHOD FOR PLASTIC EXTRUSION ARE DISCLOSED HEREIN IN WHICH A HEATER ELEMENT WITH THE DIE IS MAINTAINED AT A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF A BLOWING AGENT INCORPORATED IN A PLASTIC MELT TO BE EXTRUDED, AND THE BODY AND EXIT ORIFICE OF THE DIE ARE MAINTAINED AT A TEMPERATURE BELOW THE DECOMPOSITION TEMPERATURE OF THE BLOWING AGENT.
Inventors
- 👤 Robert F Baker
- 👤 Ebon P Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:52
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/505; B29K; B29K2105/00; B29K2105/04; B29K2105/043; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/13; Y10S264/14
Claims Analysis
Total Claims: 0
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |