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US4076652A
Expired / Lapsed
US
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Elastic resistor compositions containing metallic-conductive particles and conductive lubricant particles
Assignee: EIDP Inc
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Filing: 1976-05-24
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Granted: 1978-02-28
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Expires: 1996-05-24
Abstract
Abstract Elastic resistor compositions comprising metallic-conductive particles and solid conductive lubricant particles codistributed in a matrix of a curable, elastomer-forming polymer and the cured compositions formed therefrom. Elastic resistors made from said compositions are also disclosed.
Inventors
- 👤 James Barry Ganci
- 👤 Sebastian V. R. Mastrangelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:35
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/10; H01C10/106
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
An elastic resistor composition comprising: i. from 15 to 45 volume percent of metallic-conductive transition metal compound particles, said particles having a Knoop microhardness at 100 grams of applied load (K 100 ) of at least 500 kg/mm 2 and an electrical resistivity of less than 1000 microohm-cm, ii. from 4 to 30 volume percent of electrically conductive graphite particles having lamellarly ordered, mobile crystalline planes and a bulk conductivity of at least about 10 -3 reciprocal ohm-cm, the sum of (i) and (ii) being 25 to 55 volume percent, and iii. from 45 to 75 volume percent of elastomer.
Claim 2
Dependent Claim
100 words
An elastic resistor composition comprising: i. from 15 to 45 volume percent of metallic-conductive transition metal compound particles, said particles having a Knoop microhardness at 100 grams of applied load (K 100 ) of at least 500 kg/mm 2 and an electrical resistivity of less than 1000 microohm-cm, ii. from 4 to 30 volume percent of electrically conductive graphite particles having lamellarly ordered, mobile crystalline planes and a bulk conductivity of at least about 10 -3 reciprocal ohm-cm, the sum of (i) and (ii) being 25 to 55 volume percent, and iii. from 45 to 75 volume percent of elastomer.
Claim 3
Dependent Claim
13 words
An elastic resistor composition of claim 1 wherein the metallic-conductive particles are TiC.
Claim 4
Dependent Claim
15 words
An elastic resistor composition of claim 1, wherein the metallic-conductive particles are TiSi 2 .
Claim 5
Dependent Claim
19 words
An elastic resistor composition of claim 1 wherein the elastomer is selected from silicone rubber and A-B-A block copolymers.
Claim 6
Dependent Claim
13 words
An elastic resistor composition of claim 4 wherein the elastomer is silicone rubber.
Claim 7
Dependent Claim
18 words
An elastic resistor composition of claim 4 wherein the elastomer is A-B-A block copolymer of styrene and butadiene.
Claim 8
Dependent Claim
13 words
An elastic resistor composition of claim 5 wherein the metallic-conductive particles are TiC.
Claim 9
Dependent Claim
15 words
An elastic resistor device comprising the elastic resistor composition of claim 1 within emplaced electrodes.
Claim 10
Dependent Claim
18 words
An elastic resistor device of claim 8 wherein the electrodes are bonded to the composition of claim 1.
References Cited (Backward Citations)
US3265765A
Cited
US3806471A
Cited
US3629774A
Cited
US3648002A
Cited
US3875434A
Cited
US3912668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |