Patent US2682977A successfully refreshed from Google Patents.
Patent US3305893A successfully refreshed from Google Patents.
US3305893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder
Assignee: Individual
•
Filing: 1964-07-09
•
Granted: 1967-02-28
•
Expires: 1984-07-09
Abstract
No abstract record available.
Inventors
- 👤 James F Machen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:35
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/875; B29C48/36; B29C48/395; B29C48/50; B29C48/505; B29C48/56; B29C48/68; B29C48/685; B29C48/686; B29C48/80; B29C48/83; B29C48/832; B29C48/84; B29C48/845; B29C48/86; B29C48/865; B29C48/03; B29C48/40; B29C48/51; B29C48/515; B29C48/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN AN EXTRUDER OF THE TYPE DESCRIBED: A COOL BORE; MECHANICAL FORCE-FEED SCREW MEANS ROTATABLE IN SAID COOL BORE; FEED GROOVES IN SAID COOL BORE CO-ACTING WITH SAID SCREW MEANS; COOLING MEANS FOR SAID BORE; COOLING MEANS FOR SAID SCREW; A SEPARATE MELTING CHAMBER COMMUNICATING WITH SAID COOL BORE; HEATING MEANS FOR SAID MELTING CHAMBER; MEANS OF LIMITING HEAT CONDUCTING BETWEEN SAID MELTING CHAMBER AND SAID BORE; THE ENTIRETY OF SAID SCREW MEANS CONTAINED WITHIN THE LENGTH OF SAID COOL BORE; A RAW MATERIAL INLET FOR SAID BORE; AND, AN EXTRUDATE OUTLET FOR SAID MELTING CHAMBER.
Claim 2
Dependent Claim
96 words
IN AN EXTRUDER OF THE TYPE DESCRIBED: A COOL BORE; MECHANICAL FORCE-FEED SCREW MEANS ROTATABLE IN SAID COOL BORE; FEED GROOVES IN SAID COOL BORE CO-ACTING WITH SAID SCREW MEANS; COOLING MEANS FOR SAID BORE; COOLING MEANS FOR SAID SCREW; A SEPARATE MELTING CHAMBER COMMUNICATING WITH SAID COOL BORE; HEATING MEANS FOR SAID MELTING CHAMBER; MEANS OF LIMITING HEAT CONDUCTING BETWEEN SAID MELTING CHAMBER AND SAID BORE; THE ENTIRETY OF SAID SCREW MEANS CONTAINED WITHIN THE LENGTH OF SAID COOL BORE; A RAW MATERIAL INLET FOR SAID BORE; AND, AN EXTRUDATE OUTLET FOR SAID MELTING CHAMBER.
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |