US5409981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor polymeric compound based on lampblack, polymeric semiconductor body, and methods of making the semiconductor polymeric compound and the polymeric semiconductor body
Assignee: Metagal Industria e Comercio Ltda
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Filing: 1994-03-30
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Granted: 1995-04-25
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Expires: 2014-03-30
Abstract
Abstract The method of making a semiconductor polymeric compounds includes an "A" phase consisting of preparing a mixture of a polymeric matrix consisting essentially of 60% by weight low density polyethylene and 8.5% by weight ethylene vinyl acetate based on a total amount of the polymeric compound to be prepared with 20% by weight of a conductive lampblack with a porous structure and 4.0% by weight of a spreading agent consisting of calcium stearate, about 3% by weight of an antioxidant, and 0.5% of a coupling agent consisting of calcium titanate; and a "B" phase including incorporating the conductive component in the polymeric matrix. A semiconductor body according to the invention is also made.
Inventors
- 👤 Humberto T. Kadooka
- 👤 Ricardo P. Moreno
- 👤 Olavo N. Da Costa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K3/00; C08K3/02; C08K3/04; C08K3/18; C08K3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A semiconductor polymeric compound consisting essentially of about 60% by weight of low density polyethylene, of about 8.5% by weight ethylene vinyl acetate copolymer, of about 20% by weight of a conductive lampblack with a porous structure, of about 4.0% by weight of a spreading agent consisting of calcium stearate, of about 3.0% by weight of an antioxidant and about 0.5% by weight of a coupling agent consisting of calcium titanate.
Claim 2
Dependent Claim
71 words
A semiconductor polymeric compound consisting essentially of about 60% by weight of low density polyethylene, of about 8.5% by weight ethylene vinyl acetate copolymer, of about 20% by weight of a conductive lampblack with a porous structure, of about 4.0% by weight of a spreading agent consisting of calcium stearate, of about 3.0% by weight of an antioxidant and about 0.5% by weight of a coupling agent consisting of calcium titanate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-24 | 1998-10-24 | 1999-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-24 | 2002-10-24 | 2003-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-24 | 2006-10-24 | 2007-04-25 | $7700.00 | Window Closed / Lapsed |