Patent US4095821A successfully refreshed from Google Patents.
Patent UST922007I4 successfully refreshed from Google Patents.
UST922007I4
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection moulding
Assignee: —
•
Filing: 1973-04-05
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Granted: 1974-05-07
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Expires: 1993-04-05
Abstract
Abstract INJECTION MOULDING PROCESS WITH SEQUENTIAL INJECTION OF DISSIMILAR MATERIALS INTO A MOULD CAVITY DEFINED BY AT LEAST TWO MOULD MEMBERS IN AT LEAST ONE OF WHICH A RETRACTABLE MEMBER IS SLIDABLY MOUNTED, THE RETRACTABLE MEMBER BEING INITIALLY IN THE NON RETRACTED POSITION, PREFERABLY PROTRUDING BEYOND THE SURFACE OF THE MOULD MEMBER INTO THE CAVITY, AND SAID MEMBER BEING RETRACTED BEFORE OR DURING INJECTION OF THE SECOND MATERIAL BUT BEFORE THE MOULD CAVITY IS FILLED. THIS ENABLES THE DISTRIBUTION OF THE FIRST AND SECOND MATERIALS INSIDE THE MOULD CAVITY TO BE MODIFIED.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:02
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/16; B29C45/1642; B29C44/00; B29C44/02; B29C44/08; B29C44/083; B29C44/086; B29C45/1635; B29C45/1639
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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |