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US3963677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impermeable silicone composition
Assignee: Individual
•
Filing: 1974-11-21
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Granted: 1976-06-15
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Expires: 1994-11-21
Abstract
Abstract A fluid and ion impermeable, durable, and substantially inert plastic composition containing at least about 50% by weight silicone and the remainder of a fluorocarbon and a wax. The fluorocarbon may be chemically combined or suspended as particles in the silicone, and the pores in the product are filled at least partially with a melted wax such as a natural wax like beeswax or a mineral wax as a micro-crystaline wax or even a synthetic wax as polyethylene. This composition or product is polymerized and/or vulcanized in a mold or the shape in which it is to be used with the aid of a catalyst and/or heat. The product also may contain inert fillers such as diatomaceous earth, silica and/or residues of the catalysts used in its vulcanization or final polymerization. Because of its impermeability to fluids and the transport of ions this product is used for encapsulating or potting of electrical and electronic apparatus imbedded in moisture containing and/or chemically active environments, such as the body, the ground or earth, and the like.
Inventors
- 👤 Carl C. Enger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:19
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; Y; Y10; Y10S; Y10S525/00; Y10S525/937
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
44 words
A plastic composition substantially impermeable to electrolytes comprising: A. between about 50% and 95% by weight of a silicone polymer, B. between about 1% and 40% by weight of a fluorocarbon polymer and C. between about 0.1% and 25% by weight of a wax.
Claim 2
Dependent Claim
44 words
A plastic composition substantially impermeable to electrolytes comprising: A. between about 50% and 95% by weight of a silicone polymer, B. between about 1% and 40% by weight of a fluorocarbon polymer and C. between about 0.1% and 25% by weight of a wax.
Claim 3
Dependent Claim
19 words
A composition according to claim 1 including a filler comprising a powdered silicon material suspended in said silicone polymer.
Claim 4
Dependent Claim
16 words
An electrical insulator impermeable to fluids and ion transfer having the composition according to claim 1.
Claim 5
Dependent Claim
12 words
A composition according to claim 1 including about 10% of said wax.
Claim 6
Dependent Claim
14 words
A composition according to claim 1 wherein said silicone polymer is a cross-linked dimethyl-siloxane.
Claim 7
Dependent Claim
18 words
A composition according to claim 1 wherein said fluorocarbon polymer comprises polytetrafluoroethylene particles dispersed in said silicone polymer.
Claim 8
Dependent Claim
16 words
A composition according to claim 1 wherein said fluorocarbon polymer and silicone polymer comprise a co-polymer.
Claim 9
Dependent Claim
13 words
A composition according to claim 1 wherein said wax comprises a natural wax.
Claim 10
Dependent Claim
12 words
A composition according to claim 8 wherein said wax comprises a beeswax.
Claim 11
Dependent Claim
14 words
A composition according to claim 1 wherein said wax comprises a micro-crystaline paraffin wax.
Claim 12
Dependent Claim
13 words
A composition according to claim 1 wherein said wax comprises a synthetic wax.
Claim 13
Dependent Claim
11 words
A composition according to claim 11 wherein said wax comprises polyethylene.
Claim 14
Dependent Claim
16 words
A composition according to claim 1 containing between about 65% and 95% by weight silicone polymer.
Claim 15
Dependent Claim
17 words
A composition according to claim 1 containing between about 70% and 90% by weight of silicone polymer.
Claim 16
Dependent Claim
17 words
A composition according to claim 1 containing between about 60% and 80% by weight of silicone polymer.
Claim 17
Dependent Claim
17 words
A composition according to claim 1 containing between about 65% and 75% by weight of silicone polymer.
Claim 18
Dependent Claim
16 words
A composition according to claim 1 including less than about 10% by weight of inert filler.
Claim 19
Dependent Claim
19 words
A composition according to claim 17 wherein said filler comprises less than micron sized particles of a siliceous material.
Claim 20
Dependent Claim
20 words
A composition according to claim 17 wherein said filler comprises less than micron sized particles of an inert metallic oxide.
Claim 21
Dependent Claim
20 words
A composition according to claim 1 including particles ranging from 0.5 to 50 microns in size of a fluorocarbon polymer.
Claim 22
Dependent Claim
18 words
A composition according to claim 20 wherein the particles are preferably less than about 20 microns in size.
Claim 23
Dependent Claim
21 words
A composition according to claim 1 wherein said fluorocarbon polymer comprises between about 5% and 25% by weight of said composition.
Claim 24
Dependent Claim
12 words
A composition according to claim 1 wherein said fluorocarbon polymer is polytetrafluoroethylene.
Claim 25
Dependent Claim
19 words
A composition according to claim 1 wherein the percentage of wax is between about 1% and 20% by weight.
Claim 26
Dependent Claim
19 words
A composition according to claim 1 when the percentage of wax is between about 5% and 15% by weight.
Claim 27
Dependent Claim
21 words
A composition according to claim 1 containing about 20% of said fluorocarbon polymer and about 10% of said wax by weight.
Claim 28
Dependent Claim
9 words
An in-vivo implantable flexible composition according to claim 1.
Claim 29
Dependent Claim
17 words
A composition according to claim 1 wherein said wax comprises a mixture of two or more waxes.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |