Patent US4351746A successfully refreshed from Google Patents.
US4351746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound dispersions and films
Assignee: EIDP Inc
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Filing: 1980-07-25
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Granted: 1982-09-28
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Expires: 2000-07-25
Abstract
Abstract A dielectric composition is disclosed having three separate phases, one electrically conductive, combined to yield a compound dispersion with high dielectric constant and low dissipation factor. The composition is made into a film and the film is used in electrical capacitors.
Inventors
- 👤 Darrell J. Parish
- 👤 Robert S. Mallouk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:30
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01B; H01B1/00; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A compound dispersion comprising: (i) electrically conductive carbon particles 0.01 to 20 microns in average diameter; (ii) a polyolefin having the carbon particles evenly distributed therein to yield a primary dispersion of about 25 to 75 weight percent carbon particles and the remainder polyolefin; and (iii) a polyester made from dicarboxylic acids or esterforming derivatives thereof and glycols and substantially immiscible with the polyolefin of the primary dispersion, containing less than about 5 weight percent of the carbon particles, and having the primary dispersion evenly distributed therein to yield the compound dispersion of about 5 to 20 weight percent primary dispersion and the remainder polyester.
Claim 2
Dependent Claim
105 words
A compound dispersion comprising: (i) electrically conductive carbon particles 0.01 to 20 microns in average diameter; (ii) a polyolefin having the carbon particles evenly distributed therein to yield a primary dispersion of about 25 to 75 weight percent carbon particles and the remainder polyolefin; and (iii) a polyester made from dicarboxylic acids or esterforming derivatives thereof and glycols and substantially immiscible with the polyolefin of the primary dispersion, containing less than about 5 weight percent of the carbon particles, and having the primary dispersion evenly distributed therein to yield the compound dispersion of about 5 to 20 weight percent primary dispersion and the remainder polyester.
Claim 3
Dependent Claim
12 words
The compound dispersion of claim 1 wherein the polyolefin is alkylcarboxyl-substituted polyolefin.
Claim 4
Dependent Claim
12 words
The compound dispersion of claim 1 in the form of a film.
Claim 5
Dependent Claim
23 words
The film of claim 3 oriented by stretching at least two times the initial dimension in both the transverse and the longitudinal directions.
Claim 6
Dependent Claim
24 words
The compound dispersion of claim 1 wherein the individual primary dispersion domains have an average spherical equivalent diameter of about 0.1 to 20 microns.
Claim 7
Dependent Claim
12 words
The compound dispersion of claim 1 wherein the polyester is polyethylene terephthalate.
Claim 8
Dependent Claim
12 words
The compound dispersion of claim 2 in the form of a film.
Claim 9
Dependent Claim
23 words
The film of claim 7 oriented by stretching at least two times the initial dimension in both the transverse and the longitudinal directions.
Claim 10
Dependent Claim
12 words
The compound dispersion of claim 2 wherein the polyester is polyethylene terephthalate.
Claim 11
Dependent Claim
12 words
The compound dispersion of claim 9 in the form of a film.
Claim 12
Dependent Claim
23 words
The film of claim 10 oriented by stretching at least two times the initial dimension in both the transverse and the longitudinal directions.
References Cited (Backward Citations)
GB1030335A
Cited
US3405198A
Cited
US3435093A
Cited
US3719729A
Cited
US3579609A
Cited
US3585255A
Cited
US3923726A
Cited
US3668172A
Cited
US3769260A
Cited
US4010222A
Cited
US4174358A
Cited
US4174358B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |