Patent US3243485A successfully refreshed from Google Patents.
US3243485A
Expired / Lapsed
US
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Fabrication of foamed plastic articles
Assignee: Dow Chemical Co
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Filing: 1963-07-09
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Granted: 1966-03-29
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Expires: 1983-07-09
Abstract
No abstract record available.
Inventors
- 👤 Griffin John Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:11
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5627; B29C44/02; B29C44/10; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/255; Y; Y10; Y10S; Y10S220/00; Y10S220/902; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD FOR THE MANUFACTURE OF SHAPED ARTICLES FROM EXTRUDED SYNTHETIC ORGANIC THERMOSPLASTIC RESINOUS SHEET MATERIAL AFTER SAID MATERIAL IS AN ESSENTIALLY COMPLETELY EXPANDED FOAM FORM WHICH COMPRISES: MECHANICALLY SHAPING SAID EXPANDED SHEET MATERIAL THROUGH A MAJOR AND SUBSTANTIAL CHANGE IN CROSS-SECTIONAL CONFIGURATION WITHOUT SUBSTANTIAL DENSIFICATION THEREOF BY MEANS OF AN APPLIED PRESSURE OF BETWEEN ABOUT 0.1 TO LESS THAN 15 POUNDS PER SQUARE INCH ABSOLUTE PRESSURE, WHILE SAID EXPANDED SHEET MATERIAL IS STILL HOT AND THERMOPLASTIC FROM EXTRUSION.
Claim 2
Independent Claim
79 words
A METHOD FOR THE MANUFACTURE OF SHAPED ARTICLES FROM EXTRUDED SYNTHETIC ORGANIC THERMOSPLASTIC RESINOUS SHEET MATERIAL AFTER SAID MATERIAL IS AN ESSENTIALLY COMPLETELY EXPANDED FOAM FORM WHICH COMPRISES: MECHANICALLY SHAPING SAID EXPANDED SHEET MATERIAL THROUGH A MAJOR AND SUBSTANTIAL CHANGE IN CROSS-SECTIONAL CONFIGURATION WITHOUT SUBSTANTIAL DENSIFICATION THEREOF BY MEANS OF AN APPLIED PRESSURE OF BETWEEN ABOUT 0.1 TO LESS THAN 15 POUNDS PER SQUARE INCH ABSOLUTE PRESSURE, WHILE SAID EXPANDED SHEET MATERIAL IS STILL HOT AND THERMOPLASTIC FROM EXTRUSION.
References Cited (Backward Citations)
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US2873481A
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US2797443A
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US2945261A
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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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |