US3663333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding material having a low coefficient of friction to a substrate
Assignee: Fabreeka International Holdings Inc
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Filing: 1969-07-18
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Granted: 1972-05-16
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Expires: 1989-07-18
Abstract
Abstract Method of bonding sheet material having a very low coefficient of friction to a substrate such as rubber, felt or the like, which comprises providing, as an uncured bonding material, cotton textile fabric impregnated with a thermosetting general purpose phenolic resin; buffing the surface of the substrate; placing thereon a ply of the uncured bonding material; placing the lowcoefficient material upon the bonding layer and then vulcanizing the assembly.
Inventors
- 👤 Donald H Palfreyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:01
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/108
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
The method according to claim 1, further characterized in that, in curing the bonding material, the assembled parts are subjected to a pressure of approximately 300 psi at a temperature of the order of 290* F., and maintaining said pressure until the bonding material has been cured.
Claim 2
Dependent Claim
58 words
The method according to claim 2, and wherein the surface material is a fluorocarbon sheet, further characterized in that the textile fabric in the bonding material is a cotton canvas of a weight in excess of 4 ounces per square yard and of a yarn count of approximately 56 warp yarns and 24 double filling yarns per inch.
Claim 3
Dependent Claim
52 words
The method according to claim 1, further characterized in cutting the surface material to a size such that when placed upon the bonding layer it overlaps the latter approximately one-fourth inch all around, cooling the cured material after removal from the press, and then trimming the edges to the final desired dimensions.
Claim 4
Dependent Claim
14 words
The method according to claim 4, further characterized in buffing the edges after trimming.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |