Patent US4351920A successfully refreshed from Google Patents.
US4351920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic resin composition
Assignee: DIC Corp
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Filing: 1981-05-01
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Granted: 1982-09-28
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Expires: 2001-05-01
Abstract
Abstract A thermoplastic resin composition comprising (a) 5 to 40% by weight of a rubber-modified styrene/maleic anhydride copolymer resin and (b) 95 to 60% by weight of a polycarbonate resin as main components.
Inventors
- 👤 Nagao Ariga
- 👤 Kyotaro Shimazu
- 👤 Hidenori Takenaka
- 👤 Hiroyuki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:28
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
32 words
A thermoplastic resin composition comprising (a) 5 to 40% by weight of a rubber-modified styrene/maleic anhydride copolymer resin and (b) 95 to 60% by weight of a polycarbonate resin as main components.
Claim 2
Dependent Claim
32 words
A thermoplastic resin composition comprising (a) 5 to 40% by weight of a rubber-modified styrene/maleic anhydride copolymer resin and (b) 95 to 60% by weight of a polycarbonate resin as main components.
Claim 3
Dependent Claim
29 words
The composition of claim 1 wherein said rubber-modified styrene/maleic anhydride copolymer resin (a) is prepared by reacting styrene monomer with maleic anhydride in the presence of a rubber component.
Claim 4
Dependent Claim
24 words
The composition of claim 1 wherein said polycarbonate resin (b) is obtained by reacting an aromatic dihydroxyl compound with phosgene or a diaryl carbonate.
Claim 5
Dependent Claim
13 words
The composition of claim 3 wherein said aromatic dihydroxy compound is a bis(hydroxyaryl)alkane.
Claim 6
Dependent Claim
26 words
The composition of claim 3 wherein said diaryl carbonate is a compound selected from the group consisting of diphenylene carbonate, di(bisphenylene)carbonate, dinaphthylene carbonate and dianthrylene carbonate.
Claim 7
Dependent Claim
12 words
The composition of claim 3 wherein said aromatic dihydroxy compound is 2,2-bis-(4-hydroxyphenyl)propane.
Claim 8
Dependent Claim
12 words
The composition of claim 3 wherein said aromatic dihydroxy compound is bis-(2-hydroxyphenyl)methane.
Claim 9
Dependent Claim
12 words
The composition of claim 3 wherein said aromatic dihydroxy compound is 1,1-bis(4-hydroxyphenyl)ethane.
Claim 10
Dependent Claim
12 words
The composition of claim 3 wherein said aromatic dihydroxy compound is 2,2-bis(4-hydroxy-3,5-dibromophenyl)-propane.
Claim 11
Dependent Claim
12 words
The composition of claim 3 wherein said aromatic dihydroxy compound is 2,2-bis(4-hydroxy-3,5-dichlorophenyl)-propane.
Claim 12
Dependent Claim
24 words
The composition of claim 1 wherein the weight ratio of the rubber-modified styrene/maleic anhydride copolymer resin (a) to the polycarbonate resin (b) is from
Claim 13
Dependent Claim
27 words
The composition of claim 1 wherein the weight ratio of the rubber-modified styrene/maleic anhydride copolymer resin (a) to the polycarbonate resin (b) is from 15:85 to 25:75.
References Cited (Backward Citations)
US3966842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |