US3775359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigid polyvinyl chloride resin powder composition for extrusion processes
Assignee: Diamond Shamrock Plastics Corp
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Filing: 1970-06-12
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Granted: 1973-11-27
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Expires: 1990-06-12
Abstract
Abstract A DENSIFIED RIGID POLYVINYL CHLORIDE RESIN POWDER COMPOSITION IS DESCRIBED WHICH IS PARTICULARLY ADAPTED TO THE PREPARATION OF MANY DIFFERENT TYPES OF PLASTIC ARTICLES BY EXTRUSION, ALTHOUGH INCORPORATING NO RESINOUS PROCESSING AIDS AS REQUIRED HERETOFORE IN RIGID POLYVINYL CHLORIDE RESIN POWDER COMPOSITIONS FOR THE SUCCESSFUL EXTRUSION THEREOF. HAVING A BULK DENSITY RANGING FROM 0.55 G./CC. TO ABOUT 0.80 G./CC. DEPENDING UPON THE BULK DENSITY OF THE BASE RESIN INCORPORATED, THE COMPOSITION CONTAINS, BY WEIGHT OF THE RESIN, FROM 0.25% TO 7% OF A HEAT AND LIGHT STABILIZER THERFOR; FROM 0.5% TO 20% OF A FILLERPIGMENT; AND FROM ABOUT 0.10% TO 5% OF A NONRESINOUS LUBRICANT.
Inventors
- 👤 J Georgiana
- 👤 J Rolls
- 👤 D Voss
- 👤 A Mierzwa
- 👤 R Paradis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |