Patent US3559240A successfully refreshed from Google Patents.
US3559240A
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US
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Bulk plastic handling
Assignee: Phillips Petroleum Co
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Filing: 1967-07-19
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Granted: 1971-02-02
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Expires: 1987-07-19
Abstract
Abstract COMPRESSIBLE BULK MATERIAL IN PARTICULATE FORM IS FED TO AN EXTRUDER BY MEANS OF A FORCE FEEDER HAVING COMPRESSION AND METERING SECTIONS PROVIDED WITH GROOVES SUBSTANTIALLY ALIGNED WITH THE DIRECTION OF PLASTIC FLOW WHEREIN THE BULK PLASTIC IS SUBSTANTIALLY COMPRESSED PRIOR TO INJECTION INTO THE EXTRUDER.
Inventors
- 👤 Edward J Kosinsky
- 👤 William E Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:40
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/286; B29C48/288; B29C48/022; B29C48/03
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |