US2850764A
Expired / Lapsed
US
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Process and apparatus for converting thermoplastic material to granular form
Assignee: Imperial Chemical Industries Ltd
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Filing: 1954-08-27
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Granted: 1958-09-09
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Expires: 1974-08-27
Abstract
No abstract record available.
Inventors
- 👤 John William Frederick Farr
- 👤 William Surman Gilmour
- 👤 Alexander Kennaway
- 👤 Peter John Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:27
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/065; B29B9/16; Y; Y10; Y10S; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
AN EXTURSION APPARATUS FOR CONVERTING THERMOPLASTIC POLYMERIC MATERIALS TO GRANNULAR FORM COMPRISING A BATH OF COOLING LIQUID, MEANS FOR EXTRUDING MATERIAL INTO SAID LIQUID, SAID MEANS HAVING A PLURALITY OF DIE ORIFICES RADIALLY DISPOSED ABOUT A CENTRAL AXIS, ROTARY CUTTER MEANS WITHIN SAID LIQUID FOR CUTTING EXTRUDED MATERIAL UNTO GRANULES, SAID CUTTER MEANS MOUNTED FOR ROTATION ABOUT SAID AXIS, MEANS FOR CONTINUOUSLY SUPPLYING COOLING LIQUID TO THE REGION OF SAID AXIS WHEREBY SAID LIQUID IS DRIVEN OUTWARDLY BY CENTRIFUGAL FORCE AWAY FROM SAID CUTTER MEANS AND ENTRAINS SAID GRANNULES, AND MEANS FOR WITHDRAWING SAID COOLING LIQUID WITH THE GRANNULES ENTRAINED THEREIN AS SAID LIQUID IS DRIVEN OURWARDLY AWAY FROM SAID CUTTER MEANS BY CONTRIFUGAL FORCE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |