Patent US4657980A successfully refreshed from Google Patents.
US4657980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic resin blend comprising 80 to 95 wt % of polycarbonate and 5 to 20 wt % of poly-p-methylstyrene
Assignee: Tonen General Sekiyu KK
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Filing: 1985-10-18
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Granted: 1987-04-14
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Expires: 2005-10-18
Abstract
Abstract A thermoplastic resin composition which comprises 80 to 95 wt % of polycarbonate resin and 5 to 20 wt % of poly-p-methylstyrene. The thermoplastic resin composition is useful as a molding material for automotive parts, electric appliances, other industrial products and articles for daily use.
Inventors
- 👤 Yuji Fujita
- 👤 Noboru Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:47
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
A thermoplastic resin blend consisting essentially of 80 to 95 wt % polycarbonate resin and 5 to 20 wt % of poly-p-methylstyrene.
Claim 2
Dependent Claim
22 words
A thermoplastic resin blend consisting essentially of 80 to 95 wt % polycarbonate resin and 5 to 20 wt % of poly-p-methylstyrene.
Claim 3
Dependent Claim
23 words
The blend in accordance with claim 1 consisting essentially of 85 to 90 wt % polycarbonate and 10 to 15 wt % poly-p-methylstyrene.
Claim 4
Dependent Claim
42 words
The blend of claim 1 wherein the polycarbonate resin is obtained from the reaction of a dihydroxydiaryl compound with phosgene or from the reaction of a dihydroxydiaryl compound with a carbonate ester and the poly-p-methylstyrene is obtained by the polymerization of p-methylstyrene.
References Cited (Backward Citations)
US4463130A
Cited
US4539371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |