Patent US3769394A successfully refreshed from Google Patents.
US3769394A
Expired / Lapsed
US
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Method for finishing blow molded plastic containers in the mold
Assignee: Primerica Inc
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Filing: 1971-09-15
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Granted: 1973-10-30
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Expires: 1991-09-15
Abstract
Abstract A method and apparatus for finishing the neck portion of a blow molded plastic container in the mold. A parison is aligned in a mold having an undercut in the flash or moil forming cavity. the flash or moil is then sheared above the undercut by a plunger, whose further descent into the parison provides a mold for the sealing surfaces and the inside and outside neck surfaces adjacent the sealing surfaces. The descending plunger substantially finish forms the sealing surface and the adjacent neck surfaces.
Inventors
- 👤 M Latreille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:56
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/48; B29C49/50; 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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |