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Patent US3145240A successfully refreshed from Google Patents.
US3145240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding of foam polymeric structures
Assignee: Atlantic Richfield Co
•
Filing: 1961-08-07
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Granted: 1964-08-18
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Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Victor W Proulx
- 👤 Gerald F Lafferty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:42
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/42; B29C44/424; Y; Y10; Y10S; Y10S264/00; Y10S264/14; Y10S264/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A RPOCESS FOR PRODUCING A FOAMED POLYMERIC CUPSHAPED ARTICLE HAVING A BASE AND A SUBSTANTIALLY CYLINDRICAL SIDE, WHICH COMPRISES FLOWING A VOLUME SMALLER THAN THE VOLUME OF THE MOLD OF MOLTEN EXPANDABLE BUT UNEXPANDED POLYMERIC MATERIAL FROM AN INJECTION MOLDING MACHINE INTO THE PERIPHERY OF A CUP-SHAPED MOLD CAVITY THROUGH A CONICAL CHANNEL SUCH THAT SAID MATERIAL EXPANDS, FLOWING SAID EXPANDING MATERIAL ALONG THE SIDE OF SAID CUP-SHPAED MOLD CAVITY, AND FLOWING SAID EXPANDING MATERIAL TO THE BASE OF SAID CUP-SHAPED MOLD CAVITY WHILE SIMULTANEOUSLY REMOVING GAS FROM SAID CAVITY, THEREAFTER COOLING SAID MATERIAL TO A TEMPERATURE AT WHICH THE MATE-
Claim 2
Dependent Claim
101 words
A RPOCESS FOR PRODUCING A FOAMED POLYMERIC CUPSHAPED ARTICLE HAVING A BASE AND A SUBSTANTIALLY CYLINDRICAL SIDE, WHICH COMPRISES FLOWING A VOLUME SMALLER THAN THE VOLUME OF THE MOLD OF MOLTEN EXPANDABLE BUT UNEXPANDED POLYMERIC MATERIAL FROM AN INJECTION MOLDING MACHINE INTO THE PERIPHERY OF A CUP-SHAPED MOLD CAVITY THROUGH A CONICAL CHANNEL SUCH THAT SAID MATERIAL EXPANDS, FLOWING SAID EXPANDING MATERIAL ALONG THE SIDE OF SAID CUP-SHPAED MOLD CAVITY, AND FLOWING SAID EXPANDING MATERIAL TO THE BASE OF SAID CUP-SHAPED MOLD CAVITY WHILE SIMULTANEOUSLY REMOVING GAS FROM SAID CAVITY, THEREAFTER COOLING SAID MATERIAL TO A TEMPERATURE AT WHICH THE MATE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |