US3574789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester processing aids for pvc resin
Assignee: OCCIDENTIAL ELECTROCHEMICALS Corp
•
Filing: 1967-09-15
•
Granted: 1971-04-13
•
Expires: 1987-09-15
Abstract
Abstract RIGID COMPOSITIONS, CONTAINING POLVINYL CHLORIDE RESIN, RETAIN DESIRABLE RIGIDITY, AND EXHIBIT ENHANCED PROCESSING PROPERTIES, E.G., A LOWER PROCESSING TEMPERATURE, AS A RESULT OF BLENDING THE RESIN WITH A MINOR AMOUNT OF LOW MOLECULAR WEIGHT (DEGREE OF POLYMERIZATION BELOW ABOUT 30) POLYESTER RESINS. THE POLYESTER RESINS SUITABLE FOR MODIFYING AGENTS ARE TYPICALLY PREPARED FROM SHORT CHAIN ALIPHATIC GLYCOL AND DIACID BUILDING BLOCKS. RESULTING HOMOGENEOUS PRODUCTS, IN ADDITION TO RIGIDITY, RETAIN EXSENTIALLY THE DESIRABLE PHYSICAL PROPERTIES OF UNMODIFIED SOLID COMPOSITIONS.
Inventors
- 👤 Janis A Bungs
- 👤 Charles L Sieglaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:52
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |