Patent US3671141A successfully refreshed from Google Patents.
US3671141A
Expired / Lapsed
US
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Extruder comprising a screw having pegs
Assignee: Somerset Technologies Inc
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Filing: 1971-01-08
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Granted: 1972-06-20
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Expires: 1991-01-08
Abstract
Abstract A SPECIALLY CONSTRUCTED SCREW FOR AN EXTUDER OF POTENTIALLY PLASTICIZABLE MATERIALS, E.G., SO-CALLED TERMOPLASTIC RESINS, WHICH COMPRISES RADIALLY-ALIGNED PEGS BASED IN A NON-ECCENTRIC UNDERCUT CHANNEL AREA OF THE SCREW CORE.
Inventors
- 👤 Lloyd Kovacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:00
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/565; B29C48/03; B29C48/09; B29C48/10
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |