Patent US4904752A successfully refreshed from Google Patents.
Patent US3235643A successfully refreshed from Google Patents.
US3235643A
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Method and apparatus for molding of articles with finished edges
Assignee: Union Carbide Corp
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Filing: 1962-11-05
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Granted: 1966-02-15
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Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 Peter H Hofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:06
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/02; B29C43/20; B29C43/203; B29C43/32; B29C43/36; B29C43/3607; B29C43/38; B29C70/00; B29C70/68; B29C70/78; B29C70/80; B29C43/361; B29C2043/3615; B29C2043/3618; Y; Y10; Y10S; Y10S425/00; Y10S425/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR PRODUCING FLASH-FREE ARTICLES WHICH COMPRISES PLACING A MASS OF MOLTEN PLASTIC MATERIAL IN A MOLD HAVING AT LEAST TWO FORMING MEMBERS HAVING GAPS THEREBETWEEN, PROVIDING AT LEAST ONE DEFORMABLE RESILIENT AND NON-COMPRSSIBLE SEALING MEMBERS DISPOSED ANNULARLY ABOUT AT LEAST ONE OF SAID FORMING MEMBERS AND ADJACENT TO SAID GAPS AND THEN SUBJECTING SAID SEALING MEMBER AND SAID MOLTEN PLASTIC MATERIAL TO COMPRESSIVE FORCES SO THAT SAID SEALING MEMBER PROTURDES INTO SAID GAPS AND PREVENTS THE ESCAPE OF SAID MOLTEN PLASTIC MATERIAL FROM BETWEEN SAID FORMING MEMBERS INTO FLASH-FORMING REGIONS.
Claim 2
Dependent Claim
92 words
A PROCESS FOR PRODUCING FLASH-FREE ARTICLES WHICH COMPRISES PLACING A MASS OF MOLTEN PLASTIC MATERIAL IN A MOLD HAVING AT LEAST TWO FORMING MEMBERS HAVING GAPS THEREBETWEEN, PROVIDING AT LEAST ONE DEFORMABLE RESILIENT AND NON-COMPRSSIBLE SEALING MEMBERS DISPOSED ANNULARLY ABOUT AT LEAST ONE OF SAID FORMING MEMBERS AND ADJACENT TO SAID GAPS AND THEN SUBJECTING SAID SEALING MEMBER AND SAID MOLTEN PLASTIC MATERIAL TO COMPRESSIVE FORCES SO THAT SAID SEALING MEMBER PROTURDES INTO SAID GAPS AND PREVENTS THE ESCAPE OF SAID MOLTEN PLASTIC MATERIAL FROM BETWEEN SAID FORMING MEMBERS INTO FLASH-FORMING REGIONS.
References Cited (Backward Citations)
US2823422A
Cited
US2963738A
Cited
US2881480A
Cited
US3094758A
Cited
US2965946A
Cited
US3056166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |