US5219657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamideimide insulated wire
Assignee: Sumitomo Electric Wintec Inc
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Filing: 1992-06-08
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Granted: 1993-06-15
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Expires: 2012-06-08
Abstract
Abstract An insulated wire comprising a conductor coated and baked thereon with an insulating lacquer, the insulating lacquer comprising (a) 100 parts by weight of a polyamideimide resin having a molecular weight corresponding to a reduced specific viscosity of from 0.1 to 1.0, and (b) 75 to 400 parts by weight of a stabilized polyisocyanate compound derived from diphenylmethane-diisocyanate.
Inventors
- 👤 Isao Ueoka
- 👤 Teruyuki Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:09
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6415; C08G18/6438; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
An insulated wire comprising a conductor coated and baked thereon with a solderable insulating lacquer, said solderable insulating lacquer comprising a blend of (a) 100 parts by weight of a polyamideimide resin having a molecular weight corresponding to a reduced specific viscosity of from 0.1 to 1.0, and (b) 75 to 400 parts by weight of a stabilized polyisocyanate compound; wherein said stabilized polyisocyanate compound is derived from blocking isocyanate groups of diphenylmethanediisocyanate singly or from reacting dipehnylmethanediisocyanate with a polyol to form a polyisocyanate and stabilizing with a blocking agent.
Claim 2
Dependent Claim
91 words
An insulated wire comprising a conductor coated and baked thereon with a solderable insulating lacquer, said solderable insulating lacquer comprising a blend of (a) 100 parts by weight of a polyamideimide resin having a molecular weight corresponding to a reduced specific viscosity of from 0.1 to 1.0, and (b) 75 to 400 parts by weight of a stabilized polyisocyanate compound; wherein said stabilized polyisocyanate compound is derived from blocking isocyanate groups of diphenylmethanediisocyanate singly or from reacting dipehnylmethanediisocyanate with a polyol to form a polyisocyanate and stabilizing with a blocking agent.
Claim 3
Dependent Claim
30 words
An insulated wire as claimed in claim 1, wherein said polyamideimide resin is derived from a reaction of an aromatic tricarboxylic anhydride or a derivative thereof with an aromatic diisocyanate.
Claim 4
Dependent Claim
17 words
An insulated wire as claimed in claim 1, wherein said insulating lacquer further comprises an epoxy resin.
Claim 5
Dependent Claim
17 words
An insulated wire as claimed in claim 3, wherein said epoxy resin is a brominated phenoxy resin.
Claim 6
Dependent Claim
17 words
An insulated wire as claimed in claim 2, wherein said insulating lacquer further comprises an epoxy resin.
Claim 7
Dependent Claim
26 words
An insulated wire as claimed in claim 1, wherein said polyamideimide resin has a molecular weight corresponding to a reduced specific viscosity of 0.2 to 0.5.
Claim 8
Dependent Claim
26 words
An insulated wire as claimed in claim 2, wherein said polyamideimide resin has a molecular weight corresponding to a reduced specific viscosity of 0.2 to 0.5.
Claim 9
Dependent Claim
25 words
An insulated wire as claimed in claim 1, wherein said polyamideimide resin has a molecular weight corresponding to a reduced specific viscosity of about 0.3.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |