US3010157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing moldings of foamed thermoplastic resins
Assignee: Monsanto Chemicals Ltd
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Filing: 1958-10-07
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Granted: 1961-11-28
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Expires: 1978-10-07
Abstract
No abstract record available.
Inventors
- 👤 Eric P Cizek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:46
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/224; Y; Y10; Y10S; Y10S264/00; Y10S264/46; Y10S425/00; Y10S425/055; Y10S521/00; Y10S521/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A PROCESS FOR PREPARING A FOAMED THERMOPLASTIC ARTICLE WHICH COMPRISES COMPLETELY FILLING A SEALED MOLD WITH SMALL PARTICLES OF A FOAMED THERMOPLASTIC RESIN HAVING DISPERSED THEREIN, AS A FOAMING AGENT, AN ORGANIC LIQUID WHICH BOILS BELOW THE SOFTENING POINT OF THE RESIN AND WHICH HAS AT MOST A SLIGHT SOLVENT ACTION ON THE THERMOPLASTIC RESIN, THE SURFACES OF SUBSTANTIALLY ALL OF SAID FOAMED THERMOPLASTIC RESIN PARTICLES BEING COATED WITH A MATERIAL OF THE GROUP CONSISTING OF (A) AN AQUEOUS SOLUTION HAVING DISSOLVED THEREIN BOTH A SURFACE ACTIVE AGENT AND 0.001-20 WEIGHT PERCENT OF A ELECTROLYTE AND (B) AN AQUEOUS SOLUTION HAVING DISSOLVED THEREIN ONLY AN IONIC SURFACE ACTIVE AGENT, AND PASSING ELECTRIC WAVES OF HIGH FREQUENCY ALTERNATING CURRENT THROUGH THE SEALED MOLD FOR A PERIOD OF TIME SUFFICIENT TO CONVERT THE WATER OF THE AQUEOUS COATING CARRIED ON SAID FOAMED THERMOPLASTIC RESIN PARTICLES INTO STEAM AND FURTHER FOAM SAID
Claim 2
Dependent Claim
149 words
A PROCESS FOR PREPARING A FOAMED THERMOPLASTIC ARTICLE WHICH COMPRISES COMPLETELY FILLING A SEALED MOLD WITH SMALL PARTICLES OF A FOAMED THERMOPLASTIC RESIN HAVING DISPERSED THEREIN, AS A FOAMING AGENT, AN ORGANIC LIQUID WHICH BOILS BELOW THE SOFTENING POINT OF THE RESIN AND WHICH HAS AT MOST A SLIGHT SOLVENT ACTION ON THE THERMOPLASTIC RESIN, THE SURFACES OF SUBSTANTIALLY ALL OF SAID FOAMED THERMOPLASTIC RESIN PARTICLES BEING COATED WITH A MATERIAL OF THE GROUP CONSISTING OF (A) AN AQUEOUS SOLUTION HAVING DISSOLVED THEREIN BOTH A SURFACE ACTIVE AGENT AND 0.001-20 WEIGHT PERCENT OF A ELECTROLYTE AND (B) AN AQUEOUS SOLUTION HAVING DISSOLVED THEREIN ONLY AN IONIC SURFACE ACTIVE AGENT, AND PASSING ELECTRIC WAVES OF HIGH FREQUENCY ALTERNATING CURRENT THROUGH THE SEALED MOLD FOR A PERIOD OF TIME SUFFICIENT TO CONVERT THE WATER OF THE AQUEOUS COATING CARRIED ON SAID FOAMED THERMOPLASTIC RESIN PARTICLES INTO STEAM AND FURTHER FOAM SAID
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |