US3845353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical conductive floor tile and method for making same
Assignee: Individual
•
Filing: 1971-10-26
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Granted: 1974-10-29
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Expires: 1991-10-26
Abstract
Abstract This invention pertains in general to electrically conductive floor tiles and particularly to floor tiles composed mainly of thermoplastic material to which electrically conductive material, in the form of great quantities of small flakes, are formed in multiple layers so that a pattern composed of streaks of these flakes appear on the surface and bottom of the tile thereby providing a conductive floor tile with a volume resistivity in the order of 1012 to 1013 ohm-cm., with a maximum electrical charge of less than 10 12 coulomb/cm2.
Inventors
- 👤 S Shirai
- 👤 K Sasamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:01
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/02; H05F3/025; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
An electrically conducting floor tile, comprising: an integral base sheet of non-conductive plastic material of a given color comprised of a plurality of self-adhered layers, a plurality of individual slugs of plastic material embedded in each layer in a random pattern, said slugs being of the same thickness as the layer in which they are embedded and of randomly elongated form, a plurality of electrically conductive particles dispersed throughout each of the slugs including the opposite surfaces thereof forming conductive areas of flake-like appearance and of a different color than the base sheet, at least some of the conductive areas being in electrical contact and the other of the conductive areas being in such close proximity to each other and to the at least some of the conductive areas as to form a grounding path for electrical charges between opposite surfaces of the tile.
Claim 2
Dependent Claim
144 words
An electrically conducting floor tile, comprising: an integral base sheet of non-conductive plastic material of a given color comprised of a plurality of self-adhered layers, a plurality of individual slugs of plastic material embedded in each layer in a random pattern, said slugs being of the same thickness as the layer in which they are embedded and of randomly elongated form, a plurality of electrically conductive particles dispersed throughout each of the slugs including the opposite surfaces thereof forming conductive areas of flake-like appearance and of a different color than the base sheet, at least some of the conductive areas being in electrical contact and the other of the conductive areas being in such close proximity to each other and to the at least some of the conductive areas as to form a grounding path for electrical charges between opposite surfaces of the tile.
Claim 3
Dependent Claim
34 words
An electrically conducting floor tile as defined in claim 1, wherein said tile has a volume resistivity of about 1012 to 103 ohm-cm. and a maximum electrostatic charge of less than 10 12 coulomb/cm2.
Claim 4
Dependent Claim
20 words
A floor tile as defined in claim 1 further including a conductive sheet secured to one surface of the tile.
Claim 5
Dependent Claim
29 words
A floor tile as defined in claim 1, a second like floor tile coextensive therewith and a conductive sheet secured to and between the opposed surfaces of the tiles.
Claim 6
Dependent Claim
27 words
A floor tile as defined in claim 1 wherein the plastic sheet is polyvinyl chloride and the electrically conductive material of the conductive areas comprises carbon powder.
Claim 7
Dependent Claim
28 words
An electrically conductive floor tile according to claim 1, wherein additional slugs of plastic material of a third color are embedded within each layer in a random pattern.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |