US3707296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified phenolic resin system and laminates made therefrom
Assignee: Westinghouse Electric Corp
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Filing: 1970-01-09
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Granted: 1972-12-26
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Expires: 1990-01-09
Abstract
Abstract A laminate, that can be used as an exterior, refinishable surface for snow skis, comprises a plurality of plastic resin impregnated bonded paper sheets, each having been impregnated with a solution of a melamine-formaldehyde, phenol-formaldehyde resinous admixture which contains from about 10 to 70 weight percent melamine-formaldehyde resin solids based on phenolformaldehyde resin solids.
Inventors
- 👤 Salvatore E Palazzolo
- 👤 Harold O Mccaskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:54
CPC Classifications
A; A63; A63C; A63C5/00; A63C5/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
The resin solution of claim 1 wherein the catalyst is selected from the group consisting of ammonia, calcium carbonate and sodium hydroxide, the solvent is selected from the group consisting of methanol, ethanol and isopropyl alcohol, the melamine resin being present in the amount of from about 20 to 40 weight percent melamine-formaldehyde resin solids based on phenol-formaldehyde resin solids.
Claim 2
Dependent Claim
20 words
impregnating paper sheets with a solution of the admixture to a resin to paper ratio of between 0.75:1 to 2:1;
Claim 3
Dependent Claim
13 words
preparing a stacked assembly comprising a plurality of said resin impregnated sheets; and
Claim 4
Dependent Claim
51 words
A refinishable laminate comprising a plurality of bonded, resin impregnated paper sheets, impregnated with a catalyzed melamine-formaldehyde resin, phenol-formaldehyde resin admixture, said admixture comprising from 10 to 70 weight percent melamine-formaldehyde resin solids based on phenol-formaldehyde resin solids, wherein the weight percent resin: paper is a ratio between 0.75 to 2.0:1.0.
Claim 5
Dependent Claim
10 words
heat and pressure consolidating the assembly into a unitary structure.
Claim 6
Dependent Claim
25 words
The refinishable laminate of claim 3 wherein the admixture comprises from about 20 to 40 weight percent melamine-formaldehyde resin solids based on phenol-formaldehyde resin solids.
Claim 7
Dependent Claim
57 words
The refinishable laminate of claim 4 wherein the paper sheets are color pigmented kraft paper sheets, the catalyst in the admixture is selected from the group consisting of ammonia, calcium carbonate and sodium hydroxide and the melamine-formaldehyde resin comprises a resin having a mole ratio of formaldehyde : melamine of from about 1.5 :1to 2 : 1.
Claim 8
Independent Claim
17 words
A method of making a refinishable laminate comprising a plurality of bonded sheets comprising the steps of:
Claim 9
Dependent Claim
82 words
The method of claim 6 wherein the resin to paper ratio is between about 1.25 : 1 to 1.75 : 1, the admixture comprises from about 20 to 40 weight percent melamine-formaldehyde resin solids based on phenol-formaldehyde resin solids, the catalyst in the resin admixture is selected from the group consisting of ammonia, calcium carbonate and sodium hydroxide and the melamine-formaldehyde resin comprises a resin having a mole ratio of formaldehyde : melamine of from about 1.5 : 1 to 2 :
Claim 10
Dependent Claim
28 words
The method of claim 7 wherein the admixture contains ammonia catalyst and the stacked assembly is consolidated at between about 1,200 to 1,500 psi and 250* to 325*F.
Claim 11
Dependent Claim
36 words
The method of claim 7 wherein the admixture is in a solution of a solvent selected from the group consisting of methanol, ethanol and isopropyl alcohol and the paper sheets are color pigmented kraft paper sheets.
Claim 12
Dependent Claim
81 words
A snow ski comprising a flexible core surrounded by a laminated top surface, base surface, and sidewalls between the top surface and base surface, the improvement being refinishable top surface and sidewall laminations comprising a plurality of bonded, resin impregnated paper sheets impregnated with a catalyzed, melamine-formaldehyde resin, phenol-formaldehyde resin admixture, said resin aDmixture comprising from 10 to 70 weight percent melamine-formaldehyde resin solids based on phenol-formaldehyde resin solids and the weight percent resin:paper is a ratio between 0.75 to 2.0:1.0.
Claim 13
Dependent Claim
55 words
The snow ski of claim 10 also having a refinishable base surface comprising a plurality of bonded, resin impregnated paper sheets, the sheets of the top surface, base surface and sidewall being impregnated with the admixture, wherein the admixture comprises from about 20 to 40 weight percent melamine-formaldehyde resin solids based on phenol-formaldehyde resin solids.
Claim 14
Dependent Claim
55 words
The snow ski of claim 10 wherein the paper sheets are color pigmented kraft paper sheets, the catalyst in the resin admixture is selected from the group consisting of ammonia, calcium carbonate and sodium hydroxide and the melamine-formaldehyde resin comprises a resin having a mole ratio of formaldehyde: melamine of from about 1.5:1 to 2:1.
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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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |