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US4724257A
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Aromatic polythioetheramide-imide
Assignee: Mitsubishi Chemical Corp
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Filing: 1986-07-14
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Granted: 1988-02-09
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Expires: 2006-07-14
Abstract
Abstract An aromatic polythioetheramide-imide having a recurring unit of the following general formula (II): ##STR1## wherein --Ar--, which may be the same or different in the polymer, each represents a divalent aromatic residue. The aromatic polythioetheramide-imides are excellent in the balance of mechanical properties, heat resistance and moldability and can be used widely for parts in electric and electronic fields, housings, automobile parts, aircraft interior parts, sliding parts, gears, insulating materials, heat-resistant films, heat-resistant varnishes, heat-resistant fibers, etc.
Inventors
- 👤 Mitsutoshi Aritomi
- 👤 Makoto Terauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:11
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
33 words
An aromatic polythioetheramide-imide having a recurring unit of the following general formula (II): ##STR10## wherein --Ar--, which is the same or different each occurrence in the polymer, each represents a divalent aromatic residue.
Claim 2
Dependent Claim
33 words
An aromatic polythioetheramide-imide having a recurring unit of the following general formula (II): ##STR10## wherein --Ar--, which is the same or different each occurrence in the polymer, each represents a divalent aromatic residue.
Claim 3
Dependent Claim
116 words
An aromatic polythioetheramide-imide as claimed in claim 1, wherein said divalent aromatic residue has the following general formula: ##STR11## wherein A represents --O--, --CO--, --SO--, --SO 2 -- or --C y H 2y -- in which y is an integer of from 1 to 10, Y represents an alkyl group having 1 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, halogen or a nitro group, a, b, c, d, e and f each is 0 or an integer of from 1 to 4, and x is a number of from 0 to 20.
References Cited (Backward Citations)
US4405770A
Cited
US4621134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |