Patent US3674134A successfully refreshed from Google Patents.
US3103409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making thermoplastic pipes
Assignee: —
•
Filing: —
•
Granted: 1963-09-10
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Expires: 1980-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:07
CPC Classifications
B; B29; B29C; B29C67/00; B29C48/00; B29C48/001; B29C48/03; B29C48/09; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C55/00; B29C55/22; B29C55/26; B29C48/0018; B29C48/0022; B29C48/10; B29C48/16; B29C48/18; B29C48/23; B29K; B29K2059/00; B29K2077/00; B29K2995/00; B29K2995/0037; B29K2995/0072; Y; Y10; Y10S; Y10S264/00; Y10S264/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR THE MANUFACTURE OF THERMOPLASTIC PIPE FROM PARTIALLY CRYSTALLINE THERMOPLASTIC POLYMERS WHICH COMPRISES, EXTRUDING THE SAID THERMOPLASTIC POLYMERS WITH AN EXTRUDER, AT A TEMPERATURE ABOVE THE CRYSTALLINE MELTING POINT OF THE SAID THERMOPLASTIC POLYMERS. THROUGH A DIE HAVING A MANDREL EXTENDING THROUGH SAID DIE, WHEREBY A REGION OF PRESSURE IS CREATED THROUGHOUT THE THERMOPLASTIC WITH THE SAID DIE AMD MANDREL ASSEMBLY, THE SAID PRESSURE BEING RELEASED AT THE DIE FACE, SAID MANDREL HAVING A HEATED ZONE REAEWARDLY WITHIN THE SAID DIE IN MECHANICAL CONTACT WITH A COLD ZONE EXTENDING AT LEAST TO THE FACE OF
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE MANUFACTURE OF THERMOPLASTIC PIPE FROM PARTIALLY CRYSTALLINE THERMOPLASTIC POLYMERS WHICH COMPRISES, EXTRUDING THE SAID THERMOPLASTIC POLYMERS WITH AN EXTRUDER, AT A TEMPERATURE ABOVE THE CRYSTALLINE MELTING POINT OF THE SAID THERMOPLASTIC POLYMERS. THROUGH A DIE HAVING A MANDREL EXTENDING THROUGH SAID DIE, WHEREBY A REGION OF PRESSURE IS CREATED THROUGHOUT THE THERMOPLASTIC WITH THE SAID DIE AMD MANDREL ASSEMBLY, THE SAID PRESSURE BEING RELEASED AT THE DIE FACE, SAID MANDREL HAVING A HEATED ZONE REAEWARDLY WITHIN THE SAID DIE IN MECHANICAL CONTACT WITH A COLD ZONE EXTENDING AT LEAST TO THE FACE OF
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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) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |