Patent US4856785A successfully refreshed from Google Patents.
Patent US3029474A successfully refreshed from Google Patents.
US3029474A
Expired / Lapsed
US
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Process and apparatus for the extrusion of thermoplastic material
Assignee: Lonza Electric and Chemical Works Ltd
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Filing: 1958-07-07
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Granted: 1962-04-17
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Expires: 1978-07-07
Abstract
No abstract record available.
Inventors
- 👤 Voigt Wilfried
- 👤 Holch Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:17
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/86; B29C48/03; B29C48/09; B29C48/10; B29C48/30; B29C48/32; B29C48/34; B29C48/865; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072; B29K2995/0073; Y; Y10; Y10S; Y10S264/00; Y10S264/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS OF EXTRUDING A TUBE OF THERMOPLASTIC MATERIAL, COMPRISING THE STEPS OF EXTRUCING THERMOPLASTIC MATERIAL INTO A TUBULAR BODY HAVING PREDETERMINED CROSS SECTIONAL DIAMENSIONS; PASSING SAID TUBULAR BODY AT A FIRST TEMPERATURE SUFFICEINTLY HIGH TO MAINTAIN SAID MATERIAL IN PLASTIC CONDITION THROUGH AN ANNULAR GUIDING CHANNEL HAVING THROUGHOUT ITS LENGTH UNIFORMLY SAID CROSS SECTIONAL DIMENSIONS SO THAT DURING SUCH PASSAGE SUBSTANTIALLY NO FURTHER REARANGEMENT OF SAID THERMOPLASTIC MATERIAL OF SAID TUBULAR BODY WILL TAKE PLACE; AND SUBJECTING ONLY THE INNER AND OUTER FACES OF SAID TUBULAR BODY DURING PASSAGE OF THE SAME THROUGH SAID ANNULAR, GUIDING
Claim 2
Dependent Claim
97 words
A PROCESS OF EXTRUDING A TUBE OF THERMOPLASTIC MATERIAL, COMPRISING THE STEPS OF EXTRUCING THERMOPLASTIC MATERIAL INTO A TUBULAR BODY HAVING PREDETERMINED CROSS SECTIONAL DIAMENSIONS; PASSING SAID TUBULAR BODY AT A FIRST TEMPERATURE SUFFICEINTLY HIGH TO MAINTAIN SAID MATERIAL IN PLASTIC CONDITION THROUGH AN ANNULAR GUIDING CHANNEL HAVING THROUGHOUT ITS LENGTH UNIFORMLY SAID CROSS SECTIONAL DIMENSIONS SO THAT DURING SUCH PASSAGE SUBSTANTIALLY NO FURTHER REARANGEMENT OF SAID THERMOPLASTIC MATERIAL OF SAID TUBULAR BODY WILL TAKE PLACE; AND SUBJECTING ONLY THE INNER AND OUTER FACES OF SAID TUBULAR BODY DURING PASSAGE OF THE SAME THROUGH SAID ANNULAR, GUIDING
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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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |