Patent US4585823A successfully refreshed from Google Patents.
US4585823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ovenware molded from wholly aromatic polyester composition
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1985-05-30
•
Granted: 1986-04-29
•
Expires: 2005-05-30
Abstract
Abstract Ovenwares produced by molding a wholly aromatic polyester resin composition comprising 30 to 80 wt. % of a wholly aromatic polyester having a repeating unit represented by the general formula, <IMAGE> wherein X is a C1-C4 alkyl group or -O-, -SO2-, -S- or -CO- group, m and n are 0 or 1, a d:e ratio is in the range of from 1:1 to 10:1, an e:f ratio is in the range of from 9:10 to 10:9, and the positions of substituents at each aromatic ring of the foregoing general formula are para or meta to each other, 5 to 60 wt. % of wollastonite and 5 to 60 wt. % of titanium oxide.
Inventors
- 👤 Teruo Saito
- 👤 Kuniaki Asai
- 👤 Tadayasu Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:46
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
Ovenware produced by molding a wholly aromatic polyester resin composition comprising 30 to 80 wt. % of a wholly aromatic polyester having a repeating unit represented by the general formula, ##STR4## wherein X is a C 1 -C 4 alkyl group or --O--, --SO 2 --, --S-- or --CO-- group, m and n are 0 or 1, a d:e ratio is in the range of from 1:1 to 10:1, an e:f ratio is in the range of from 9:10 to 10:9, and the positions of substituents at each aromatic ring of the foregoing general formula are para or meta to each other, 5 to 60 wt. % of wollastonite and 5 to 60 wt. % of titanium oxide.
Claim 2
Dependent Claim
118 words
Ovenware produced by molding a wholly aromatic polyester resin composition comprising 30 to 80 wt. % of a wholly aromatic polyester having a repeating unit represented by the general formula, ##STR4## wherein X is a C 1 -C 4 alkyl group or --O--, --SO 2 --, --S-- or --CO-- group, m and n are 0 or 1, a d:e ratio is in the range of from 1:1 to 10:1, an e:f ratio is in the range of from 9:10 to 10:9, and the positions of substituents at each aromatic ring of the foregoing general formula are para or meta to each other, 5 to 60 wt. % of wollastonite and 5 to 60 wt. % of titanium oxide.
References Cited (Backward Citations)
US4189422A
Cited
JPS5584321A
Cited
GB2058102A
Cited
GB2124236A
Cited
US4458039A
Cited
US4503168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |