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US4743510A
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Method of preventing the build-up of static electricity in laminated cork floor-tiles and an anti-static cork floor-tile
Assignee: CORTICEIRA AMORIM SGPD SA A CORP OF PORTUGAL
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Filing: 1986-09-05
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Granted: 1988-05-10
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Expires: 2006-09-05
Abstract
Abstract In order to prevent the build-up of static electricity in laminated cork floor tiles consisting of a layer of granular cork bonded by a binder and a wear surface preferably composed of polyvinyl chloride foil, provided on one side of the granular layer, the electrical conductivity of the laminate is increased by incorporating agents to reduce electrical resistance in the binder included in the cork layer and by incorporating antistatic agents in the wear surface. The tiles may have a moisture barrier provided on the side of the granular cork layer opposite the wear surface, the moisture barrier also incorporating an agent or agents reducing the electrical resistance thereof.
Inventors
- 👤 Josef Nemeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:51
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/16; B32B27/00; B32B27/30; B32B27/306; B32B7/00; B32B7/04; B32B7/12; B32B9/00; B32B9/02; E; E04; E04F; E04F15/00; E04F15/02; H; H05; H05F; H05F3/00; H05F3/02; H05F3/025; B32B2255/00; B32B2264/00; B32B2264/10; B32B2264/107; B32B2264/108; B32B2307/00; B32B2307/20; B32B2307/21; B32B2307/50; B32B2307/51; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7246; B32B2317/00; B32B2317/02; B32B2327/00; B32B2327/06; B32B2419/00; B32B2419/04; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/164; Y10T428/167; Y10T428/31504; Y10T428/3167
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
94 words
A method of preventing build-up of static electricity in laminated cork floor-tile comprising a layer of granular cork, a binder bonding the granular cork layer, a wear surface provided on one side of the granular layer, and moisture barrier on the side of said granular layer opposite to said wear surface, the method comprising the steps of incorporating an agent adapted to reduce electrical resistance in the binder including in the cork layer, incorporating an agent adapted to reduce electrical resistance in the moisture barrier and incorporating an anti-static agent in the wear surface.
Claim 2
Independent Claim
94 words
A method of preventing build-up of static electricity in laminated cork floor-tile comprising a layer of granular cork, a binder bonding the granular cork layer, a wear surface provided on one side of the granular layer, and moisture barrier on the side of said granular layer opposite to said wear surface, the method comprising the steps of incorporating an agent adapted to reduce electrical resistance in the binder including in the cork layer, incorporating an agent adapted to reduce electrical resistance in the moisture barrier and incorporating an anti-static agent in the wear surface.
Claim 3
Dependent Claim
18 words
A method according to claim 1, in which the moisture barrier comprises an electrically conducting layer of varnish.
Claim 4
Dependent Claim
18 words
A method according to claim 1, in which said layer of varnish comprises polyvinyl chloride vinyl acetate copolymer.
Claim 5
Dependent Claim
19 words
A method according to claim 1, in which the binder in the granular cork layer consists of curable polyones.
Claim 6
Dependent Claim
13 words
A method according to claim 4, in which the binder includes phenolic resin.
Claim 7
Dependent Claim
13 words
A method according to claim 4, in which the binder includes carbamide resin.
Claim 8
Dependent Claim
13 words
A method according to claim 4, in which the binder includes melamine resin.
Claim 9
Dependent Claim
12 words
A method according to claim 4, in which the binder includes polyurethanes.
Claim 10
Dependent Claim
29 words
A method according to claim 4 in which the content of binder is between 5 and 25 percent by weight, calculated on the weight of the layer of cork.
Claim 11
Dependent Claim
26 words
A method according to claim 4 in which the content of binder is 10 percent by weight, calculated on the weight of the layer of cork.
Claim 12
Dependent Claim
22 words
A method according to claim 4, in which carbon black and polymers are used as agents to reduce resistance in the binder.
Claim 13
Dependent Claim
32 words
A method according to claim 11, in which the binder contains 0.1-5 percent by weight carbon black and 1-10 percent by weight polyol, calculated on the weight of the layer of cork.
Claim 14
Dependent Claim
32 words
A method according to claim 11 in which the binder contains 2 percent by weight carbon black and 5 percent by weight polyol, calculated on the weight of the layer of cork.
Claim 15
Dependent Claim
15 words
A method according to claim 4, in which diethylene glycol is used in the binder.
Claim 16
Dependent Claim
14 words
A method according to claim 4, in which glycerol is used in the binder.
Claim 17
Dependent Claim
15 words
A method according to claim 4, in which polyethylene glycol is used in the binder.
Claim 18
Dependent Claim
24 words
A method according to claim 1, in which the wear surface contains 0.1-5 percent by weight antistatic agent of the ethylene oxide condensate type.
Claim 19
Dependent Claim
24 words
A method according to claim 1, in which the wear surface contains 0.1-5 percent by weight antistatic agent of the sulphonated amide derivative type.
Claim 20
Dependent Claim
80 words
A laminated cork floor-tile including a layer of granular cork, a binder bonding the granular cork layer, a wear surface provided on one side of the granular layer, and a moisture barrier provided on the side of said granular layer opposite to said wear surface, in which the binder in the cork layer contains an agent adapted to reduce electrical resistance, the wear surface includes an antistatic agent, and the moisture barrier contains an agent adapted to reduce electrical resistance.
Claim 21
Dependent Claim
80 words
A laminated cork floor-tile including a layer of granular cork, a binder bonding the granular cork layer, a wear surface provided on one side of the granular layer, and a moisture barrier provided on the side of said granular layer opposite to said wear surface, in which the binder in the cork layer contains an agent adapted to reduce electrical resistance, the wear surface includes an antistatic agent, and the moisture barrier contains an agent adapted to reduce electrical resistance.
Claim 22
Dependent Claim
20 words
A floor-tile according to claim 19, in which the mean resistance of the laminate is at most 20×10 9 ohm.
References Cited (Backward Citations)
US3764376A
Cited
US3746573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |