US3645870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing vinyl chloride polymers or copolymers having butadiene and acrylate monomers radiation grafted thereto
Assignee: Sekisui Chemical Co Ltd
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Filing: 1969-07-14
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Granted: 1972-02-29
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Expires: 1989-07-14
Abstract
Abstract PROCESS FOR PRODUCING HIGH-IMPACT RESINS COMPRISING GRAFT POLYMERIZING ALKYL ACRYLATE OF ALKYL METHACRYLATE MONOMER, BUTADIENE, AND VINYL CHLORIDE RESIN POWDER BY IMPREGNATING THE VINYL CHLORIDE RESIN WITH THE MONOMER AND IRRADIATING THE IMPREGNATED POWDER WITH IONIZING RADIATION WHILE IN CONTACT WITH GASEOUS BUTADIENE TO PROVIDE PRODUCTS HAVING SUPERIOR DURABILITY; TOGERTHER WITH THE PRODUCTS OBTAINED THEREBY.
Inventors
- 👤 Norio Sagane
- 👤 Hiroshi Harayama
- 👤 Yotaro Morishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:50
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/02; C08F259/04
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |