US3091812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot runner mold
Assignee: Individual
•
Filing: 1958-09-05
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Granted: 1963-06-04
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Expires: 1978-09-05
Abstract
No abstract record available.
Inventors
- 👤 Henry J Witkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:07
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/2725; B29C45/2737; B29C45/2738
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
167 words
A PLASTIC MOLDING DIE COMPRISING AN UPPER PART AND A LOWER PART, SAID UPPER PART DEING DIVIDED INTO AN INNER PART AND AN OUTER PART, A GROOVE FORMED IN SAID INNER PART, A GROOVE IN SAID OUTER PART OVERLYING SAID GROOVE IN SAID INNER PART, A CAVITY FORMED IN SAID LOWER PART, A BORE THROUGH SAID INNER PART CONNECTING SAID GROOVES WITH SAID CAVITY, AN INSERT IN SAID BORE, SAID INSERT BEING WELDED TO A SHEATH COMPRISING A LARGE TUBE, A SMALL TUBE CONCENTRICALLY DISPOSED IN SAID SHEATH AND WELDED TO SAID INSERT, A NOZZLE OPENING IN SAID INSERT CONNECTING SAID SMALL TUBE WITH SAID CAVAITY, HEATING MEANS FOR SAID TUBE, HEAT INSULATING MATERIAL DISPOSED BETWEEN SAID SHEATH AND SAID SMALL TUBE, THE END OF SAID TUBE REMOTE FROM SAID NOZZLE OPENING BEING CONNECTED TO A SECOND INSERT, SAID SECOND INSERT BEING WELDED IN AN OPENING IN SAID OUTER PART, AND A NOZZLE OPENING THROUGH SAID SECOND INSERT CONNECTING SAID TUBE WITH THE OUTSIDE OF SAID DIE.
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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |