Patent US3653859A successfully refreshed from Google Patents.
US3653859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive foam laminate
Assignee: Saint Gobain Abrasives Inc
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Filing: 1969-12-04
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Granted: 1972-04-04
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Expires: 1989-12-04
Abstract
Abstract A high density abrasive-containing foam product is made by impregnating a low density foam with a slurry of adhesive and abrasive, drying the same below the cure temperature of the adhesive and then laminating the dried and impregnated foam to a reinforcing backing by heat and pressure which both densifies the foam and effects the lamination using the abrasive binder adhesive to effect adhesion between the foam component and the backing component.
Inventors
- 👤 William F Zimmer Jr
- 👤 Harvey L Chew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:19
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/001; B24D11/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
An article as in claim 1 wherein said densities range from 2 to 6 pounds per cubic foot for the initial low density up to 10 to 30 pounds per cubic foot for said higher density.
Claim 2
Dependent Claim
30 words
An article as in claim 1 wherein said foaM sheet is bonded to said reinforcing backing by the same adhesive used to bond the abrasive grain to said foam sheet.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |