Patent US3928706A successfully refreshed from Google Patents.
US3928706A
Expired / Lapsed
US
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Wear-resistant decorative laminates and methods for producing same
Assignee: Formica Corp
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Filing: 1973-06-25
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Granted: 1975-12-23
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Expires: 1993-06-25
Abstract
Abstract The invention provides a wear-resistant decorative laminate obtained by consolidating an assembly of (1) a core of thermosetting resin-impregnated sheets, (2) a coloured or printed thermosetting resin-impregnated fibrous sheet, (3) a wearresistant layer containing a thermosetting resin, a finely divided water-insoluble mineral matter having a hardness of at least 7 and a finely divided fibrous cellulosic material, and (4) a thermosetting resin-impregnated Alpha -cellulose paper overlay sheet. The laminates have a high degree of wear-resistance.
Inventors
- 👤 Harold Gibbons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:32
CPC Classifications
B; B44; B44C; B44C5/00; B44C5/04; B44C5/0469; B44C5/0476; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/18; B32B2264/00; B32B2264/04; B32B2307/00; B32B2307/40; B32B2307/402; B32B2307/50; B32B2307/554; B32B2317/00; B32B2317/12; B32B2317/125; B32B2451/00; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/259; Y10T428/31; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
107 words
A WEAR-RESISTANT DECORATIVE PLASTICS LAMINATE, BEING THE CONSOLIDATED CURED UNITARY STRUCTURE OBTAINED BY THE APPLICATION OF HEAT AND PRESSURE TO A SUPERIMPOSED ASSEMBLY CONSISTING ESSENTIALLY OF, IN THIS ORDER, (1) A CORE OF THERMOSETTING RESIN-IMPREGNATED FIRBOUS SHEETS, (2) A COLOURED OR PRINTED DECORATIVE FIBROUS SHEET IMPREGNATED WITH A THERMOSETTING RESIN, (3) A WEAR-RESISTANT LAYER CONSISTING ESSENTIALLY OF A THERMOSETTING RESIN COMPOSITION, A FINELY DIVIDED WATERINSOLUBLE MINERAL MATTER HAVING A HARDNESS OF AT LEAST 7 ON THE MOH''S SCALE OF HARDNESS AND A FINELY DIVIDED FIBROUS CELLULOSIC MATERIAL AND (4), AS AN OUTERMOST LAMINA, AN OVERLAY SHEET CONSISTING ESSENTIALLY OF AN ALPHA-CELLULOSE PAPER IMPREGNATED WITH A THERMOSETTABLE RESIN.
Claim 2
Dependent Claim
107 words
A WEAR-RESISTANT DECORATIVE PLASTICS LAMINATE, BEING THE CONSOLIDATED CURED UNITARY STRUCTURE OBTAINED BY THE APPLICATION OF HEAT AND PRESSURE TO A SUPERIMPOSED ASSEMBLY CONSISTING ESSENTIALLY OF, IN THIS ORDER, (1) A CORE OF THERMOSETTING RESIN-IMPREGNATED FIRBOUS SHEETS, (2) A COLOURED OR PRINTED DECORATIVE FIBROUS SHEET IMPREGNATED WITH A THERMOSETTING RESIN, (3) A WEAR-RESISTANT LAYER CONSISTING ESSENTIALLY OF A THERMOSETTING RESIN COMPOSITION, A FINELY DIVIDED WATERINSOLUBLE MINERAL MATTER HAVING A HARDNESS OF AT LEAST 7 ON THE MOH''S SCALE OF HARDNESS AND A FINELY DIVIDED FIBROUS CELLULOSIC MATERIAL AND (4), AS AN OUTERMOST LAMINA, AN OVERLAY SHEET CONSISTING ESSENTIALLY OF AN ALPHA-CELLULOSE PAPER IMPREGNATED WITH A THERMOSETTABLE RESIN.
Claim 3
Dependent Claim
58 words
A laminate as claimed in claim 1 wherein said wear resistant layer consists essentially of from about 6 to about 26 parts by weight of said finely divided water-insoluble mineral matter and from about 10 to about 40 parts by weight of said finely divided fibrous cellulosic material per 100 parts by weight of the thermosetting resin solids.
Claim 4
Dependent Claim
14 words
A laminate as claimed in claim 1 wherein said fibrous sheets are paper sheets.
Claim 5
Dependent Claim
21 words
A laminate as claimed in claim 1 wherein said thermosetting resin used to treat said core sheets is a phenol-formaldehyde resin.
Claim 6
Dependent Claim
34 words
A laminate as claimed in claim 1 wherein the thermosetting resin of said wear-resistant layer is of the same chemical nature as that used to impregnate both said decorative sheet and said overlay sheet.
Claim 7
Dependent Claim
14 words
A laminate as claimed in claim 5 wherein said thermosetting resins are melamine-formaldehyde resins.
Claim 8
Dependent Claim
24 words
A laminate as claimed in claim 1 wherein the particle size of said finely divided water-insoluble mineral matter is not greater than 50 microns.
Claim 9
Dependent Claim
32 words
A laminate as claimed in claim 1 wherein the maximum particle size of said finely divided water-insoluble mineral matter is about 30 microns and the average particle size is about 25 microns.
Claim 10
Dependent Claim
30 words
A laminate as claimed in claim 1 wherein said wear-resistant layer comprises finely divided cellulosic material having an average particle size range of about 30 microns to about 50 microns.
Claim 11
Dependent Claim
17 words
A laminate as claimed in claim 1 wherein said wear-resistant layer comprises also a penetration control additive.
Claim 12
Dependent Claim
15 words
A laminate as claimed in claim 10 wherein said penetration cOntrol additive is sodium alginate.
Claim 13
Dependent Claim
39 words
A laminate as claimed in claim 1 wherein said finely divided water-insoluble mineral matter consists essentially of a plurality of finely divided water-insoluble mineral materials each having a hardness of at least 7 on the Mohs'' scale of hardness.
Claim 14
Dependent Claim
30 words
A laminate as claimed in claim 1 wherein said wear-resistant layer also comprises a finely divided water-insoluble mineral material having a hardness of less than 7 on the Mohs'' scale.
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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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |