Patent US3287477A successfully refreshed from Google Patents.
US3287477A
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Process and apparatus for extruding a foamed plastic
Assignee: Atlantic Richfield Co
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Filing: 1963-06-17
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Granted: 1966-11-22
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Paul E Vesilind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3442; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/421; B29B7/46; B29B7/48; B29B7/488; B29B7/489; B29B7/58; B29B7/72; B29B7/726; B29B7/80; B29B7/88; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/56; B29C48/03; B29C48/09; B29C48/10; Y; Y10; Y10S; Y10S264/00; Y10S264/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
AN EXTRUSION PROCESS COMPRISING HELICALLY AND LONGITUDINALLY ADVANCING A MASS OF PLASTIC MATERIAL THROUGH A CYLINDRICAL ZONE HAVING A UNIFORM DIAMETER, WHEREUPON SAID MASS BECOMES MOLTEN DUE TO THE PRESSURE AND WORKING THEREON, DIVIDING SAID MASS INTO A PLURALITY OF SMALL STREAMS, SAID STREAMS HAVING A VELOCITY WHICH IS GREATER THAN THE VELOCITY OF THE MASS PRIOR TO BEING DIVIDED, INJECTING AN ADDITIVE INTO SAID STREAMS, THEREAFTER COMBINING SAID STREAMS, AND FORMING SAID MASS INTO A PREDETERMINED CONFIGURATION.
Claim 2
Dependent Claim
78 words
AN EXTRUSION PROCESS COMPRISING HELICALLY AND LONGITUDINALLY ADVANCING A MASS OF PLASTIC MATERIAL THROUGH A CYLINDRICAL ZONE HAVING A UNIFORM DIAMETER, WHEREUPON SAID MASS BECOMES MOLTEN DUE TO THE PRESSURE AND WORKING THEREON, DIVIDING SAID MASS INTO A PLURALITY OF SMALL STREAMS, SAID STREAMS HAVING A VELOCITY WHICH IS GREATER THAN THE VELOCITY OF THE MASS PRIOR TO BEING DIVIDED, INJECTING AN ADDITIVE INTO SAID STREAMS, THEREAFTER COMBINING SAID STREAMS, AND FORMING SAID MASS INTO A PREDETERMINED CONFIGURATION.
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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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |