Patent US3584091A successfully refreshed from Google Patents.
US3584091A
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US
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Process using an extendable blow pin with prepinched,blown parisons
Assignee: Phillips Petroleum Co
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Filing: 1969-07-10
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Granted: 1971-06-08
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Expires: 1989-07-10
Abstract
Abstract IN THE EXTRUSION OF THERMOPLASTIC PARISONS, A RETRACTABLE BLOW PIN AND PREPINCHING MEMBERS ARE PROVIDED. THE BLOW PIN IS RETRACTED TO ALLOW THE PREPINCHING MEMBERS TO SEAL OFF THE GARISON AT A POINT ADJACNET THE DIE FACE. PREBLOW FLUID IS INTRODUCED AND THE BLOW PIN EXTENDED TO ALLOW THE MOLD TO CLOSE ON IT. THE PREBLOW FLUID IS PREFERABLY PROGRAMMED TO ALLOW HIGHER INTRODUCTION PRESSURE AS THE PARISON NEARS ITS FULL DROP.
Inventors
- 👤 Thomas J Nave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:51
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/18; B29C49/02; B29C49/04; B29C49/04102; B29C49/0411; B29C49/04114
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |