Patent US2989496A successfully refreshed from Google Patents.
US2989496A
Expired / Lapsed
US
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Process for stabilization of vinyl chloride plastics containing extrudable plasticizers and stabilized product thereof
Assignee: Individual
•
Filing: 1956-05-21
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Granted: 1961-06-20
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Expires: 1976-05-21
Abstract
No abstract record available.
Inventors
- 👤 William E Palm
- 👤 Lee P Witnauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A RESIN, CONTAINING POLYMERIZED VINYL CHLORIDE, WHICH HAS BEEN PLASTICIZED WITH A PLASTICIZER HAVING A TENDENCY TO EXUDE AND SELECTED FROM THE GROUP CONSISTING OF HEXYL EPOXYSTEARATE, BUTYL TRIACETOXYSTEARATE, TRIBUTOXYETHYL PHOSPHATE, DI-2-ETHYLHEXYL SEBACATE, AND DI-2-ETHYLHEXYL AZELATE, HAVING INCORPORATED THEREIN ABOUT 0.2% TO 2%, BY WEIGHT, BASED ON THE PLASTICIZED RESIN, OF A STABILIZER SELECTED FROM THE GROUP CONSISTING OF PHENYL-B-NAPHTHYLAMINE AND ETHYLPHENYLETHANOLAMINE FOR SAID PLASTICIZED RESIN AGAINST EXUDATION OF THE PLASTICIZER.
Claim 2
Dependent Claim
71 words
A RESIN, CONTAINING POLYMERIZED VINYL CHLORIDE, WHICH HAS BEEN PLASTICIZED WITH A PLASTICIZER HAVING A TENDENCY TO EXUDE AND SELECTED FROM THE GROUP CONSISTING OF HEXYL EPOXYSTEARATE, BUTYL TRIACETOXYSTEARATE, TRIBUTOXYETHYL PHOSPHATE, DI-2-ETHYLHEXYL SEBACATE, AND DI-2-ETHYLHEXYL AZELATE, HAVING INCORPORATED THEREIN ABOUT 0.2% TO 2%, BY WEIGHT, BASED ON THE PLASTICIZED RESIN, OF A STABILIZER SELECTED FROM THE GROUP CONSISTING OF PHENYL-B-NAPHTHYLAMINE AND ETHYLPHENYLETHANOLAMINE FOR SAID PLASTICIZED RESIN AGAINST EXUDATION OF THE PLASTICIZER.
References Cited (Backward Citations)
US2588899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |