US3371387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold with mechanical seals at the parting line
Assignee: Dow Chemical Co
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Filing: 1965-10-22
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Granted: 1968-03-05
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Kenneth J Cleereman
- 👤 Edward R Sederlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:10
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/0003; B29C45/00; B29C45/17; B29C45/46; B29C45/56; B29C45/5605; Y; Y10; Y10S; Y10S277/00; Y10S277/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A MECHANICAL SEAL FOR USE IN MOLDING APPARTUS HAVING AN OUTER MOLD ELEMENT AND AN INNER MATING MOLD ELEMENT WHICH TOGETHER DEFINE A MOLD CAVITY AND ONE OF WHICH IS ROTATED OR OSCILLATED DURING THE MOLDING CYCLE, SAID MECHANICAL SEAL COMPRISING A FIRST SEALING RING FIXEDLY SECURED TO SAID OUTER MOLD ELEMENT AND EXPOSED AT THE PARTING LINE OF SAID MOLDING APPARATUS; A SEAL MEMBER INCLUDING A SECOND SEALING RING ABOUT SAID INNER MOLD ELEMENT WITH SAID SECOND SEALING RING ENGAGEABLE WITH SAID FIRST SEALING RING WHEN SAID MOLDING APPARATUS IS CLOSED; AND MEANS FOR FORCING SAID SECOND SEALING RING INTO ENGAGEMENT WITH SAID FIRST SEALING RING WHEN SAID MOLDING APPARATUS IS CLOSED.
Claim 2
Dependent Claim
113 words
A MECHANICAL SEAL FOR USE IN MOLDING APPARTUS HAVING AN OUTER MOLD ELEMENT AND AN INNER MATING MOLD ELEMENT WHICH TOGETHER DEFINE A MOLD CAVITY AND ONE OF WHICH IS ROTATED OR OSCILLATED DURING THE MOLDING CYCLE, SAID MECHANICAL SEAL COMPRISING A FIRST SEALING RING FIXEDLY SECURED TO SAID OUTER MOLD ELEMENT AND EXPOSED AT THE PARTING LINE OF SAID MOLDING APPARATUS; A SEAL MEMBER INCLUDING A SECOND SEALING RING ABOUT SAID INNER MOLD ELEMENT WITH SAID SECOND SEALING RING ENGAGEABLE WITH SAID FIRST SEALING RING WHEN SAID MOLDING APPARATUS IS CLOSED; AND MEANS FOR FORCING SAID SECOND SEALING RING INTO ENGAGEMENT WITH SAID FIRST SEALING RING WHEN SAID MOLDING APPARATUS IS CLOSED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |