US3378614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for extruding thermoplastic materials
Assignee: Shell USA Inc
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Filing: 1965-08-09
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Granted: 1968-04-16
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Expires: 1985-08-09
Abstract
No abstract record available.
Inventors
- 👤 Robert H Overcashier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:46
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/25; B29C48/30; B29C48/32; B29L; B29L2023/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF PREVENTING FURROWS IN A FOAMED THERMOPLASTIC TUBULAR EXTRUDATE THAT MOVES IN A FORWARD DIRECTION COMPRISING EXTRUDING SAID THERMOSPLASTIC AN EXTRUDER APPARATUS AT AN ANGLE SUBSTANTIALLY GREATER THAN 90* WITH RESPECT TO SAID FORWARD DIRECTION, AND FLOWING THE EXTRUDATE THENCE OUTWARDLY ALONG A CURVED PATH TO SAID FORWARD DIRECTION.
Claim 2
Independent Claim
51 words
A METHOD OF PREVENTING FURROWS IN A FOAMED THERMOPLASTIC TUBULAR EXTRUDATE THAT MOVES IN A FORWARD DIRECTION COMPRISING EXTRUDING SAID THERMOSPLASTIC AN EXTRUDER APPARATUS AT AN ANGLE SUBSTANTIALLY GREATER THAN 90* WITH RESPECT TO SAID FORWARD DIRECTION, AND FLOWING THE EXTRUDATE THENCE OUTWARDLY ALONG A CURVED PATH TO SAID FORWARD DIRECTION.
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) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |