US3177527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion apparatus with continuous stock infeed
Assignee: Crompton and Knowles Corp
•
Filing: 1962-07-16
•
Granted: 1965-04-13
•
Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Alden W Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:11
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/286; B29C48/288; B29C48/03; Y; Y10; Y10S; Y10S425/00; Y10S425/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
IN A PLASTIC STOCK EXTRUDER, THE COMBINATION WITH AN EXTRUSION CYLINDER HAVING A BORE WITH A REAR DRY-STOCK ZONE AND A REARWARDLY CONTINUING BEARING, AND A POWEROPERATED STOCK SCREW HAVING A FORWARD FEED SECTION IN SAID BORE AND A REAR SHANK RECEIVED WITH A JOURNAL FIT AN, AND EXTENDING THROUGH, SAID BEARING, OF A STOCK INFEED PROVIDING A GENERALLY CONICAL UPRIGHT HOPPER HAVING AT ITS WIDER UPPER END TWO PORTS AND AT ITS NARROWER LOWER END A DOWNWARDLY EXTENDING BARREL LEDING LATERALLY INTO SAID ZONE IN SAID CYLINDER BORE, AND BEING SEALED EXCEPT AT SAID BARREL AND PORTS, MEANS TO OPEN AND CLOSE ONE OF SAID PORTS FOR STOCK INTRODUCTION INTO SAID HOPPER, A POWER-DRIVEN SHAFT IN SAID HOPPER HAVING A FEED SCREW
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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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |