US4175152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric materials containing semiconducting refractory oxides
Assignee: Honeywell UOP LLC
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Filing: 1978-03-17
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Granted: 1979-11-20
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Expires: 1998-03-17
Abstract
Abstract Novel compositions of matter comprise polymeric materials containing, as a filler therefor, a semiconducting pyropolymeric inorganic refractory oxide material, said compositions being useful in situations which require items such as electrically conductive sheets which possess a given electrical resistance.
Inventors
- 👤 Robert D. Carnahan
- 👤 William C. Holt, Jr.
- 👤 Karl J. Youtsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:37
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/14; C; C08; C08K; C08K9/00; C08K9/02; C08K9/04; C09; C09C; C09C3/00; C09C3/10; H01B1/20; H01B1/24; C01; C01P; C01P2004/00; C01P2004/10; C01P2004/12; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/80; C01P2006/00; C01P2006/12; C01P2006/32; C01P2006/40; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/259; Y10T442/00; Y10T442/20; Y10T442/2418; Y10T442/2762; Y10T442/277; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
An electrically conductive sheet which comprises at least one layer of a reinforcing material provided with a polymeric matrix material containing from about 10% to about 95% by weight of a finely divided semiconductive filler comprising a refractory inorganic oxide having a carbonaceous pyropolymer composited on the surface thereof, said semiconductive filler having a particle size of from about 0.1 to about 100 microns and a resistivity in the range of from about 0.001 ohm-centimeter to about 10 10 ohm-centimeter.
Claim 2
Dependent Claim
80 words
An electrically conductive sheet which comprises at least one layer of a reinforcing material provided with a polymeric matrix material containing from about 10% to about 95% by weight of a finely divided semiconductive filler comprising a refractory inorganic oxide having a carbonaceous pyropolymer composited on the surface thereof, said semiconductive filler having a particle size of from about 0.1 to about 100 microns and a resistivity in the range of from about 0.001 ohm-centimeter to about 10 10 ohm-centimeter.
Claim 3
Dependent Claim
19 words
The electrically conductive sheet of claim 1 in which said sheet is heated to effect a B stage cure.
Claim 4
Dependent Claim
14 words
The electrically conductive sheet of claim 1 in which said reinforcing material is canvas.
Claim 5
Dependent Claim
15 words
The electrically conductive sheet of claim 1 in which said reinforcing material is glass cloth.
Claim 6
Dependent Claim
14 words
The electrically conductive sheet of claim 1 in which said reinforcing material is asbestos.
Claim 7
Dependent Claim
14 words
The electrically conductive sheet of claim 1 in which said reinforcing material is cardboard.
Claim 8
Dependent Claim
14 words
The electrically conductive sheet of claim 1 in which said reinforcing material is paper.
References Cited (Backward Citations)
US3992212A
Cited
US3940509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |