US2599400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making stable plastic molding composition of low shrinkage and product obtained thereby
Assignee: Individual
•
Filing: 1950-03-23
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Granted: 1952-06-03
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Expires: 1970-03-23
Abstract
No abstract record available.
Inventors
- 👤 Allan B Leerburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:44
CPC Classifications
C; C08; C08F; C08F257/00; C08F257/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
THE METHOD OF MAKING AN IMPROVED MOLDING COMPOSITION THAT HAS LOW SHRINKAGE CHARACTERISTICS DURING MOLDING, WHICH METHOD COMPRISES MIXING A INHIBITED MONOMER AND A POLYMER IN PROPORTIONS BETWEEN 35 PARTS OF MONOMER TO 65 PARTS OF POLYMER, AND 65 PARTS OF MONOMER TO 35 PARTS OF POLYMER, TOGETHER WITH A POLYMERIZATION CATALYST, BOTH THE MONOMER AND POLYMER BEING FROM THE GROUP CONSISTING OF METHYL METHACRYLATE, THE ESTER OF ACRYLIC ACID; THE ESTER OF METHYL ACRYLIC ACID; CYCLOHEXYL METHYL METHACRYLATE; METHYL ETHYL METHACRYLATE; AND STYRENE, STIRRING THE MIXTURE UNTIL IT BECOMES THICK AND THE MONOMER AND POLYMER NO LONGER SEPARATE WHEN THE STIRRING IS STOPPED, KEEPING THE MIXTURE IN A CONTAINER UNTIL THE MIXTURE JELLS INTO A GUM, AND THEREAFTER SOFTENING THE COMPOSITION BY MILLING THE GUM UNTIL IT ACQUIRES SUBSTANTIALLY THE SOFT AND PLIABLE CHARACTERISTICS OF SOFT PUTTY.
References Cited (Backward Citations)
US2120006A
Cited
US2234993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |