US4263755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive product
Assignee: Individual
•
Filing: 1979-10-12
•
Granted: 1981-04-28
•
Expires: 1999-10-12
Abstract
Abstract An abrasive sheet is disclosed which can be hand held or used with known abrasive devices, has longer abrasive life than existing abrasive sheets and has a novel attachment arrangement onto an abrasive support member. The abrasive sheet has abrasive material coated on one surface and a layer of resilient open-celled flexible foam on the other surface. The abrasive sheet may be used with a support member having a support surface with a multitude of fastening protuberances projecting from the support surface. The abrasive sheet is detachably fastened to the support member by pressing the layer of resilient open-celled foam against the support surface to have the protuberances enter and grip the open-celled foam.
Inventors
- 👤 Jack Globus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:32
CPC Classifications
B; B24; B24D; B24D11/00; B24D9/00; B24D9/08; B24D9/085
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
An abrasive device comprising: a support member having a support surface, a multitude of fastening protuberances projecting from the support surface, an abrasive sheet having abrasive material coated on one surface and a fastener layer of resilient open-celled flexible foam on the other surface, the abrasive sheet detachably fastened to the support member by pressing the layer of resilient open-celled foam against the support surface to have the protuberances enter and grip the open-celled foam.
Claim 2
Dependent Claim
75 words
An abrasive device comprising: a support member having a support surface, a multitude of fastening protuberances projecting from the support surface, an abrasive sheet having abrasive material coated on one surface and a fastener layer of resilient open-celled flexible foam on the other surface, the abrasive sheet detachably fastened to the support member by pressing the layer of resilient open-celled foam against the support surface to have the protuberances enter and grip the open-celled foam.
Claim 3
Dependent Claim
37 words
The abrasive device as claimed in claim 1 wherein the fastening protuberances project from one surface of a backing sheet, the backing sheet adhesively fastened by its opposite surface to the support surface of the support member.
Claim 4
Dependent Claim
22 words
The abrasive device as claimed in claim 2 wherein each protuberance comprises an enlarged head at the end of a slender stem.
Claim 5
Dependent Claim
19 words
The abrasive device as claimed in claim 1 wherein the layer of resilient open-celled flexible foam is air permeable.
Claim 6
Dependent Claim
19 words
The abrasive device as claimed in claim 1 wherein the layer of resilient open-celled flexible foam comprises polyurethane foam.
Claim 7
Dependent Claim
42 words
The abrasive device as claimed in claim 5 wherein the multitude of fastening protuberances are stemmed hemispheres projecting from one surface of a backing sheet, the backing sheet adhesively fastened by its opposite surface to the support surface of the support member.
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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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |