Patent US3321806A successfully refreshed from Google Patents.
US3321806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruders for injection moulding machines
Assignee: Dunlop Rubber Co Ltd
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Filing: 1964-08-25
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Granted: 1967-05-30
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 Beebee Brian Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:51
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/20; B29K; B29K2021/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
INJECTION MOULDING APPARATUS FOR RUBBER OR OTHER PLASTIC MATERIAL COMPRISING AN INJECTOR AND A MOULD HAVING ATA LEAST ONE MOULDING CAVITY THEREIN AND BEING OPERABLY ENGAGEABLE WITH THE INJECTOR, AN END SURFACE ON THE INJECTOR HAVING A FEED RECESS FORMED THEREIN, AND END SURFACE ON THE MOULD HAVING A PLURALITY OF INLET HOLES CONNECTED TO SAID MOULDING CAVITY OR CAVITIES AND SAID TWO END SURFACES BEING ENGAGEABLE SO THAT SAID FEED RECESS OF THE INJECTOR SPANS THE SAID PLURALITY OF INLET HOLES OF THE MOULD.
Claim 2
Dependent Claim
85 words
INJECTION MOULDING APPARATUS FOR RUBBER OR OTHER PLASTIC MATERIAL COMPRISING AN INJECTOR AND A MOULD HAVING ATA LEAST ONE MOULDING CAVITY THEREIN AND BEING OPERABLY ENGAGEABLE WITH THE INJECTOR, AN END SURFACE ON THE INJECTOR HAVING A FEED RECESS FORMED THEREIN, AND END SURFACE ON THE MOULD HAVING A PLURALITY OF INLET HOLES CONNECTED TO SAID MOULDING CAVITY OR CAVITIES AND SAID TWO END SURFACES BEING ENGAGEABLE SO THAT SAID FEED RECESS OF THE INJECTOR SPANS THE SAID PLURALITY OF INLET HOLES OF THE MOULD.
References Cited (Backward Citations)
US3012280A
Cited
US3159878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |