Patent US4504523A successfully refreshed from Google Patents.
US4504523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Durable, low-maintenance flooring tile
Assignee: Armstrong World Industries Inc
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Filing: 1983-06-13
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Granted: 1985-03-12
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Expires: 2003-06-13
Abstract
Abstract A decorative plastic floor tile composed of a decorative plastic base having a plurality of elements positioned on the base with a clear or translucent wear layer overlying the elements and the base. The base has raised and depressed areas. The elements comprise particles, preferably inorganic and rounded, and these are embedded in a plastic matrix which is placed only on the raised areas of the base. The particles are distributed throughout the matrix in a single layer of particles with the particles protruding from the matrix but being below the upper most level of the wear layer.
Inventors
- 👤 Jesse D. Miller, Jr.
- 👤 James A. Tshudy
- 👤 Ralph E. Unruh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:16
CPC Classifications
D; D06; D06N; D06N7/00; D06N7/0005; D06N7/0039; D06N7/0052; E; E04; E04F; E04F15/00; E04F15/02; E04F15/10; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
A method of manufacturing a decorative plastic floor tile with raised and depressed areas comprising: (a) providing a plastic tile in the approximate size range of 12"×12" to 18"×18"; (b) applying a first curable coating material matrix to only the raised areas of the plastic base, said curable coating material matrix being provided in amounts sufficient to bind together particles which may be placed on the matrix in a substantially abutting relationship and in a single layer fashion on the matrix; (c) applying an excess of particles to the matrix and then removing the excess particles; (d) embedding said remaining particles throughout the matrix in a substantially abutting relationship with the uppermost portion of the particles protruding above the matrix; (e) the particles are rounded inorganic particles and have a Moh hardness greater than 4, and a particle size distribution such that none of the particles are greater than about 595 microns, and about 55% of the particles are between about 149 and 296 microns; (f) curing the matrix; (g) applying a second overall clear or translucent curable wear layer to form a continuous coating over both raised and depressed areas and in the raised areas, providing a coating over the particles such that the particles are below the uppermost surface of the wear layer; and (h) curing the wear layer.
Claim 2
Independent Claim
221 words
A method of manufacturing a decorative plastic floor tile with raised and depressed areas comprising: (a) providing a plastic tile in the approximate size range of 12"×12" to 18"×18"; (b) applying a first curable coating material matrix to only the raised areas of the plastic base, said curable coating material matrix being provided in amounts sufficient to bind together particles which may be placed on the matrix in a substantially abutting relationship and in a single layer fashion on the matrix; (c) applying an excess of particles to the matrix and then removing the excess particles; (d) embedding said remaining particles throughout the matrix in a substantially abutting relationship with the uppermost portion of the particles protruding above the matrix; (e) the particles are rounded inorganic particles and have a Moh hardness greater than 4, and a particle size distribution such that none of the particles are greater than about 595 microns, and about 55% of the particles are between about 149 and 296 microns; (f) curing the matrix; (g) applying a second overall clear or translucent curable wear layer to form a continuous coating over both raised and depressed areas and in the raised areas, providing a coating over the particles such that the particles are below the uppermost surface of the wear layer; and (h) curing the wear layer.
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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |