Patent US3325865A successfully refreshed from Google Patents.
US3325865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion process and apparatus
Assignee: EIDP Inc
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Filing: 1963-08-14
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Granted: 1967-06-20
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Expires: 1983-08-14
Abstract
No abstract record available.
Inventors
- 👤 Dunnington Gordon Beale
- 👤 Fields Reuben Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:12
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/68; B29C48/685; B29C48/686; B29C48/362; B29C48/395; B29C48/505; B29C48/52; B29C48/56; B29C48/03; B29C48/59; B29C48/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
AN APPARATUS WHICH COMPRISES A HOUSING HAVING A FIRST SECTION HAVING A THREADED BORE, SAID FIRST SECTION HAVING AN INLET PORT ADJACENT ONE END THEREOF, SAID THREADED BORE HAVING A DIAMETER AT THE END WHICH THE INLET PORT IS ADJACENT THAT IS LARGER THAN THE DIAMETER OF THE BORE AT THE OTHER END, SAID DIAMETER GRADUALLY DIMINISHING FROM SAID INLET PORT TO A POINT INTERMEDIATE THE ENDS OF THE FIRST SECTION AND THEN REMAINING CONSTANT THROUGHOUT THE REMAINDER OF THE FIRST SECTION, A SECOND SECTION TANDEMLY LOCATED IN ABUTTING RELATIONSHIP TO THE END OF THE FIRST SECTION HAVING THE SMALLEST BORE DIAMETER, SAID SECOND SECTION HAVING A SMOOTH BORE OF ABOUT THE SAME DIAMETER AS THE DIAMETER OF THE BORE OF THE END OF THE FIRST SECTION AGAINST WHICH IT ABUTS, SAID SECOND SECTION HAVING AN OUTLET PORT LOCATED ADJACENT THE END FURTHEST REMOVED FROM THE FIRST SECTION, A ROTABLY MOUNTED THREADED MULTIPLE LEAD SCREW LOCATED WITHIN SAID FIRST SECTION, SAID SCREW BEING TAPERED THROUGHOUT PART OF ITS LENGTH TO ABOUT THE SAME DEGREE AND IN THE SAME DIRECTION AS THE BORE OF THE FIRST SECTION, SAID SCREW HAVING A THREAD OF OPPOSITE HAND TO THAT OF THE BORE, AND A ROTATABLY MOUNTED MIXING SHAFT LOCATED WITHIN THE SECOND SECTION.
Claim 2
Independent Claim
210 words
AN APPARATUS WHICH COMPRISES A HOUSING HAVING A FIRST SECTION HAVING A THREADED BORE, SAID FIRST SECTION HAVING AN INLET PORT ADJACENT ONE END THEREOF, SAID THREADED BORE HAVING A DIAMETER AT THE END WHICH THE INLET PORT IS ADJACENT THAT IS LARGER THAN THE DIAMETER OF THE BORE AT THE OTHER END, SAID DIAMETER GRADUALLY DIMINISHING FROM SAID INLET PORT TO A POINT INTERMEDIATE THE ENDS OF THE FIRST SECTION AND THEN REMAINING CONSTANT THROUGHOUT THE REMAINDER OF THE FIRST SECTION, A SECOND SECTION TANDEMLY LOCATED IN ABUTTING RELATIONSHIP TO THE END OF THE FIRST SECTION HAVING THE SMALLEST BORE DIAMETER, SAID SECOND SECTION HAVING A SMOOTH BORE OF ABOUT THE SAME DIAMETER AS THE DIAMETER OF THE BORE OF THE END OF THE FIRST SECTION AGAINST WHICH IT ABUTS, SAID SECOND SECTION HAVING AN OUTLET PORT LOCATED ADJACENT THE END FURTHEST REMOVED FROM THE FIRST SECTION, A ROTABLY MOUNTED THREADED MULTIPLE LEAD SCREW LOCATED WITHIN SAID FIRST SECTION, SAID SCREW BEING TAPERED THROUGHOUT PART OF ITS LENGTH TO ABOUT THE SAME DEGREE AND IN THE SAME DIRECTION AS THE BORE OF THE FIRST SECTION, SAID SCREW HAVING A THREAD OF OPPOSITE HAND TO THAT OF THE BORE, AND A ROTATABLY MOUNTED MIXING SHAFT LOCATED WITHIN THE SECOND SECTION.
References Cited (Backward Citations)
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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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |