US4140829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Woven heat-stretched backing members of improved dimensional stability
Assignee: Saint Gobain Abrasives Inc
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Filing: 1977-07-08
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Granted: 1979-02-20
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Expires: 1997-07-08
Abstract
Abstract A woven heat stretched fabric of polyester fiber yarns is provided which offers an improved, dimensionally stable backing member for the manufacture of coated abrasive material. Coated abrasive material incorporating this backing member is characterized by suitably controlled elongation characteristics.
Inventors
- 👤 Raymond E. Pemrick
- 👤 Paul M. Cocanour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:44
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/02; D; D03; D03D; D03D9/00; D03D15/00; D03D15/20; D03D15/283; D03D15/50; D03D15/56; D03D15/573; D10; D10B; D10B2321/00; D10B2321/06; D10B2331/00; D10B2331/04; D10B2401/00; D10B2401/06; D10B2401/061; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2049; Y10T442/2057; Y10T442/2074
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
Woven heat-stretched polyester fabric backings for manufacture of coated abrasives, said backing having an elongation profile in the area to the left of the line CD in FIG. 2 of the drawing and a fabric cover of from 80 to 95% and a weight of from 2.8 to 10 ounces per square yard.
Claim 2
Dependent Claim
53 words
Woven heat-stretched polyester fabric backings for manufacture of coated abrasives, said backing having an elongation profile in the area to the left of the line CD in FIG. 2 of the drawing and a fabric cover of from 80 to 95% and a weight of from 2.8 to 10 ounces per square yard.
Claim 3
Dependent Claim
30 words
A backing as in claim 1 having a finish coating consisting of a front size of phenol formaldehyde resin and a backsize of a mixture of phenolic and polyacrylate resins.
Claim 4
Dependent Claim
29 words
A backing as in claim 1 having a prefinish coating on the yarn of said fabric backing selected from the group consisting of polyacrylate, polyvinyl alcohol and phenol formaldehyde.
Claim 5
Dependent Claim
33 words
A backing as in claim 1 wherein the fill elongation is substantially greater, per unit of load than the warp elongation and the fabric weight is 4 to 7 ounces per square yard.
References Cited (Backward Citations)
US3328226A
Cited
US3540917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |