US2830962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing wax modified polystyrene compositions
Assignee: Union Carbide Corp
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Filing: 1954-06-14
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Granted: 1958-04-15
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Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 Peter B Potter
- 👤 Groff Frazier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:15
CPC Classifications
B; B41; B41F; B41F23/00; B41F23/04; B41F23/06; C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L91/00; C08L91/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
PROCESS FOR PREPARING WAX-CONTAINING POLYSTYRENE COMPOSITIONS WHICH COMPRISES MIXING TOGETHER AN AQUEOUS WAX EMULSION AND AN AQUEOUS POLYSTYRENE EMULSION IN PROPORTION CORRESPONDING TO BETWEEN 2 AND 10 PARTS WAX PER 100 PARTS POLYSTYRENE COAGULATING THE MIXTURE DEHYDRATING THE MIXED COAGULUM OF WAX AND POLYSTYRENE, AND THEN MECHANICALLY WORKING THE DEHYDRATED COAGULUM AT ELEVATED TEMPERATURE TO FORM A WAX-POLYSTYRENE DISPERSION CHARACTERIZED BY FREEDOM FROM WAX-SWEATOUT WHEN MOLDED UNDER HEAT AND PRESSURE.
Claim 2
Dependent Claim
70 words
PROCESS FOR PREPARING WAX-CONTAINING POLYSTYRENE COMPOSITIONS WHICH COMPRISES MIXING TOGETHER AN AQUEOUS WAX EMULSION AND AN AQUEOUS POLYSTYRENE EMULSION IN PROPORTION CORRESPONDING TO BETWEEN 2 AND 10 PARTS WAX PER 100 PARTS POLYSTYRENE COAGULATING THE MIXTURE DEHYDRATING THE MIXED COAGULUM OF WAX AND POLYSTYRENE, AND THEN MECHANICALLY WORKING THE DEHYDRATED COAGULUM AT ELEVATED TEMPERATURE TO FORM A WAX-POLYSTYRENE DISPERSION CHARACTERIZED BY FREEDOM FROM WAX-SWEATOUT WHEN MOLDED UNDER HEAT AND PRESSURE.
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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |