US3229006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of tubes of synthetic plastics or the like
Assignee: Individual
•
Filing: 1962-04-05
•
Granted: 1966-01-11
•
Expires: 1982-04-05
Abstract
No abstract record available.
Inventors
- 👤 Egon Nohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:07
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/78; B29C48/793; B29C48/86; B29C48/865; B29C48/87; B29C48/872; B29C49/00; B29C49/02; B29C49/04; B29C49/0411; B29C49/04112; B29C49/071; B29C48/10; B29C48/12; D; D10; D10B; D10B2503/00; D10B2503/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF MANUFACTURING A TUBE OF SYNTHETIC PLASTIC MATERIAL HAVING WALL SECTIONS OF UNEQUAL THICKNESS, COMPRISING THE STEPS OF EXTRUDING SYNTHETIC PLASTIC MATERIAL ECCENTRICALLY THROUGH AN EXTRUSION OPENING WITH RESPECT TO ITS WALL THICKNESS TO FORM A HOLLOW TUBULAR STRAND, AND HEATING THE SIDE HAVING THE THINNER PORTION OF THE WALL OF SAID TUBULAR STRAND AS IT IS BEING EXTRUDED TO A HIGHER TEMPERATURE THAN THE SIDE HAVING THE THICKER PORTION OF THE WALL OF SAID TUBE, WHEREBY SAID TUBULAR STRAND WILL RETAIN ITS RECTILINEAR ALIGNMENT UPON COOLING.
Claim 2
Independent Claim
89 words
A METHOD OF MANUFACTURING A TUBE OF SYNTHETIC PLASTIC MATERIAL HAVING WALL SECTIONS OF UNEQUAL THICKNESS, COMPRISING THE STEPS OF EXTRUDING SYNTHETIC PLASTIC MATERIAL ECCENTRICALLY THROUGH AN EXTRUSION OPENING WITH RESPECT TO ITS WALL THICKNESS TO FORM A HOLLOW TUBULAR STRAND, AND HEATING THE SIDE HAVING THE THINNER PORTION OF THE WALL OF SAID TUBULAR STRAND AS IT IS BEING EXTRUDED TO A HIGHER TEMPERATURE THAN THE SIDE HAVING THE THICKER PORTION OF THE WALL OF SAID TUBE, WHEREBY SAID TUBULAR STRAND WILL RETAIN ITS RECTILINEAR ALIGNMENT UPON COOLING.
References Cited (Backward Citations)
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Cited
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US2574555A
Cited
US2780835A
Cited
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |