Patent US2806812A successfully refreshed from Google Patents.
US2806812A
Expired / Lapsed
US
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Method for the preparation of formed thermoplastic sheets having a resin foam integrally bonded thereto
Assignee: Monsanto Chemicals Ltd
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Filing: 1955-11-02
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Granted: 1957-09-17
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Expires: 1975-11-02
Abstract
No abstract record available.
Inventors
- 👤 Edmund H Merz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:21
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/10; B29; B29C; B29C44/00; B29C44/34; B29C44/58; B29C65/00; B29C65/48; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/301; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/5326; B29C66/61; B29C66/70; B29C66/72; B29C66/727; B29C67/00; B29C67/20; B29C66/71; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A METHOD FOR PREPARING A MANUFACTURED ARTICLE COMPRISING A FORMED THERMOPLASTIC SHEET HAVING BONDED THERETO A LAYER OF FOAMED RESIN WHICH COMPRISES THE STEPS; (1) PREPARING A MOLD ASSEMBLY HAVING A PLURALITY OF RODS PROJECTING FROM ONE MOLD SURFACE TO THE OTHER, (2) CHARGING A FOAMABLE RESIN COMPOSITION INTO THE MOLD CAVITY (3) FOAMING THE FOAMABLE RESIN COMPOSITION SO AS TO FILL THE MOLD CAVITY, (4) REMOVING ONE MOLD HALF AND THE RODS FROM THE FIRST PREPARED MOLD ASSEMBLY TO LEAVE THE REMAINING MOLD HALF CONTAINING A RESIN FOAM HAVING A PLURALITY OF CHANNELS RUNNING FROM THE EXPOSED SURFACE THEREOF TO THE BOTTOM OF THE MOLD HALF, (5) COVERING THE REMAINING MOLD HALF WITH A THERMOSPLASTIC SHEET, (6) HEATING SAID THERRMOPLASTIC SHEET AND (7) APPLYING A VACUUM TO THE MOLD AND DRAWING THE THERMOPLASTIC SHEET INTO ENGAGEMENT WITH THE RESIN FOAM.
Claim 2
Independent Claim
141 words
A METHOD FOR PREPARING A MANUFACTURED ARTICLE COMPRISING A FORMED THERMOPLASTIC SHEET HAVING BONDED THERETO A LAYER OF FOAMED RESIN WHICH COMPRISES THE STEPS; (1) PREPARING A MOLD ASSEMBLY HAVING A PLURALITY OF RODS PROJECTING FROM ONE MOLD SURFACE TO THE OTHER, (2) CHARGING A FOAMABLE RESIN COMPOSITION INTO THE MOLD CAVITY (3) FOAMING THE FOAMABLE RESIN COMPOSITION SO AS TO FILL THE MOLD CAVITY, (4) REMOVING ONE MOLD HALF AND THE RODS FROM THE FIRST PREPARED MOLD ASSEMBLY TO LEAVE THE REMAINING MOLD HALF CONTAINING A RESIN FOAM HAVING A PLURALITY OF CHANNELS RUNNING FROM THE EXPOSED SURFACE THEREOF TO THE BOTTOM OF THE MOLD HALF, (5) COVERING THE REMAINING MOLD HALF WITH A THERMOSPLASTIC SHEET, (6) HEATING SAID THERRMOPLASTIC SHEET AND (7) APPLYING A VACUUM TO THE MOLD AND DRAWING THE THERMOPLASTIC SHEET INTO ENGAGEMENT WITH THE RESIN FOAM.
References Cited (Backward Citations)
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Cited
US2590221A
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US2614059A
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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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |