Patent US3733384A successfully refreshed from Google Patents.
US3733384A
Expired / Lapsed
US
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Process for preventing fluid leakage in extrusion blow molding
Assignee: Rheem Manufacturing Co
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Filing: 1972-01-19
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Granted: 1973-05-15
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Expires: 1992-01-19
Abstract
Abstract A blow pin on the one hand and outer are complementally shaped substantially to engage each other along a circular cutting edge when the mold sections are closed about the blow pin. The portion of the blow pin that engages the outer partible mold sections is provided with a removable sleeve formed with a pair of annular grooves extending circumferentially of the blow pin. The sleeve cooperates with removable inserts in the outer mold sections. A container is fabricated the neck of which is fully formed by the initial cooperation between the blow pin and mold sections and the remainder of which is formed by a subsequent blowing operation.
Inventors
- 👤 A Gerlovich
- 👤 G Dunbeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:46
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/58; B29C49/02; B29C49/04; B29C49/0412; B29C49/76
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |