US3992178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible coated abrasive with graphite outer layer
Assignee: Fabrika Eka AB
•
Filing: 1974-04-09
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Granted: 1976-11-16
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Expires: 1994-04-09
Abstract
Abstract A flexible abrasive article carries a layer of particles of electroconductive material on the outer surface of the abrasive side to reduce the buildup of electrostatic charge during use in sanding wood or grinding metal. Metallic and non-metallic electroconductive materials may be employed.
Inventors
- 👤 Erik L. Markoo
- 👤 Hans S. Ekblom
- 👤 Torsten Wilhelm Sandell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:58
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/001; B24D11/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
In a flexible abrasive article, comprising a flexible backing, an adhesive layer on said backing, and abrasive grits embedded in said adhesive layer, the improvement comprising an outer layer coated over said adhesive layer and said grits, said outer layer comprising an adhesive containing graphite particles having a size from 0.1 to 100 microns, the amount of graphite being from 1 to 100 grams per square meter of said abrasive article and sufficient to provide said outer layer with an electrical resistance of less than 5 megohm as measured between points 1 cm. apart.
Claim 2
Dependent Claim
94 words
In a flexible abrasive article, comprising a flexible backing, an adhesive layer on said backing, and abrasive grits embedded in said adhesive layer, the improvement comprising an outer layer coated over said adhesive layer and said grits, said outer layer comprising an adhesive containing graphite particles having a size from 0.1 to 100 microns, the amount of graphite being from 1 to 100 grams per square meter of said abrasive article and sufficient to provide said outer layer with an electrical resistance of less than 5 megohm as measured between points 1 cm. apart.
Claim 3
Dependent Claim
19 words
The article according to claim 1, wherein said graphite is of a particle size of 1 to 10 microns.
Claim 4
Dependent Claim
17 words
The article according to claim 1, wherein said graphite is of 5 to 7 micron particle size.
Claim 5
Dependent Claim
18 words
The article according to claim 1, wherein said graphite is of 90% less than 1 micron particle size.
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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) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |