Patent US4202140A successfully refreshed from Google Patents.
US4202140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive sheet
Assignee: Black and Decker Inc
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Filing: 1978-09-25
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Granted: 1980-05-13
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Expires: 1998-09-25
Abstract
Abstract The invention is directed to an abrasive sheet for cutting a workpiece and is adapted for use with a sanding tool having a base plate with a plurality of apertures formed therein and equipped with a suction arrangement for establishing a partial vacuum at each of the apertures. The abrasive sheet includes a base sheet having a plurality of apertures formed therein and located thereon to register with the apertures of the base plate. An abrasive material is secured to the base sheet for defining a plurality of channels thereon which extend outwardly from each one of the apertures of the base sheet.
Inventors
- 👤 Lorenzo E. Alessio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:01
CPC Classifications
B; B24; B24D; B24D11/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
An abrasive sheet for cutting a workpiece adapted for use with a sanding tool having suction means, the abrasive sheet comprising: a base sheet having a plurality of apertures formed therein; and, abrasive means secured to said base sheet for defining a plurality of channels thereon extending outwardly from each one of said apertures; and, said abrasive means defining a plurality of channels communicating with each two mutually adjacent ones of said apertures.
Claim 2
Dependent Claim
73 words
An abrasive sheet for cutting a workpiece adapted for use with a sanding tool having suction means, the abrasive sheet comprising: a base sheet having a plurality of apertures formed therein; and, abrasive means secured to said base sheet for defining a plurality of channels thereon extending outwardly from each one of said apertures; and, said abrasive means defining a plurality of channels communicating with each two mutually adjacent ones of said apertures.
Claim 3
Dependent Claim
113 words
An abrasive sheet for cutting a workpiece adapted for use with a sanding tool having a base plate with a plurality of apertures formed therein and equipped suction means for establishing a partial vacuum at each of said apertures, the abrasive sheet comprising: a base sheet having a plurality of apertures formed therein and located thereon to register with corresponding ones of the apertures of said base plate; abrasive means secured to said base sheet for defining a plurality of channels thereon extending ouwardly from each one of said apertures of said base sheet; and, said abrasive means defining a plurality of channels communicating with each two mutually adjacent ones of said apertures.
Claim 4
Dependent Claim
113 words
An abrasive sheet for cutting a workpiece adapted for use with a sanding tool having a base plate with a plurality of apertures formed therein and equipped suction means for establishing a partial vacuum at each of said apertures, the abrasive sheet comprising: a base sheet having a plurality of apertures formed therein and located thereon to register with corresponding ones of the apertures of said base plate; abrasive means secured to said base sheet for defining a plurality of channels thereon extending ouwardly from each one of said apertures of said base sheet; and, said abrasive means defining a plurality of channels communicating with each two mutually adjacent ones of said apertures.
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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) | 1983-05-13 | 1983-11-12 | 1984-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-13 | 1987-11-12 | 1988-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-13 | 1991-11-12 | 1992-05-13 | $7700.00 | Window Closed / Lapsed |