US3833459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Felt backing for vinyl floor covering having a binder comprised of synthetic rubber latex and a reactive thermoset resin
Assignee: Congoleum Corp
•
Filing: 1971-10-29
•
Granted: 1974-09-03
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Expires: 1991-10-29
Abstract
Abstract An vinyl floor covering having a felt backing sheet made of cellulosic or chrysotile asbestos fibers saturated with a binder comprising 36-74% synthetic rubber latex and 17-60% reactive resin of the melamine or urea formaldehyde type to which is laminated a vinyl wear layer.
Inventors
- 👤 D Winters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:24
CPC Classifications
D; D06; D06N; D06N7/00; D06N7/0005; D06N7/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
about 17-60% of a reactive resin selected from the group consisting of hexamethoxymethylmelamine; 1-hydroxymethyl-3,5-dimethoxymethyl-melamine; N,N''-dimethylol urea; dihydroxymethylolethylene urea; N,N-bis(methoxymethyl) urea; N,N''-dimethylolpropylene urea; 5,5-dimethyl-N,N''-dimethylolpropylene urea, and methylated methylol melamine; and
Claim 2
Dependent Claim
64 words
A fibrous backing sheet useful in lamination with plasticized resinous layers and having good resistance to the softening effects of plasticizers in contact therewith, consisting essentially of: a. a felted fibrous component of chrysotile asbestos fibers, b. about 12-32% of a strengthening binder for said felted fibrous component, c. said binder being deposited on said asbestos fibers in the felt making slurry and comprising:
Claim 3
Dependent Claim
27 words
about 17-60% of a reactive resin selected from the group consisting of hexamethoxymethylmelamine; 1-hydroxymethyl-3,5-dimethyoxymethyl-melamine; N,N''dimethylol urea; dihydroxymethylolethylene urea; N,N''-bis(methoxymethyl)urea; N,N''-dimethylolpropylene urea; 5,5-dimethyl-N,N''-dimethylolpropylene urea; and methylated methylolmelamine, and
Claim 4
Dependent Claim
5 words
about 4-9% of microcrystalline wax.
Claim 5
Dependent Claim
55 words
about 4-9% of microcrystalline wax; e. mixing said slurry and said binder together in said reaction vessel, f. introducing the slurry-binder mixture into precipitation equipment for even, simultaneous deposition of the binder components onto said fibers, g. forming a fibrous sheet from said slurry, and h. drying and curing said sheet at an elevated temperature.
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |