Patent US4720941A successfully refreshed from Google Patents.
US4720941A
Expired / Lapsed
US
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Self-cooling, non-loading abrading tool
Assignee: Jo-Ed Enterprises Inc
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Filing: 1986-06-23
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Granted: 1988-01-26
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Expires: 2006-06-23
Abstract
Abstract A tool for sanding, grinding, or polishing ferrous or non-ferrous work pieces which includes a plurality of abrasive particles, such as silica sand or the like, embedded in a binder matrix formed primarily of polytetrafluoroethylene and equivalent polymers. The matrix may further include a stiffening agent for adding rigidity to the tool, such as ground glass.
Inventors
- 👤 John R. Belieff
- 👤 Clarence E. Southward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:56
CPC Classifications
B; B24; B24D; B24D18/00; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D3/34; B24D3/342; B24D3/344
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
46 words
A self-cooling, non-loading abrading tool for sanding, grinding, or polishing a work piece comprising a plurality of abrasive particles embedded in a binder matrix, said binder matrix formed of at least 75% by weight of a polymeric resin selected from the group containing polytetrafluoroethylene and polymonochlorotrifluoroethylene.
Claim 2
Dependent Claim
46 words
A self-cooling, non-loading abrading tool for sanding, grinding, or polishing a work piece comprising a plurality of abrasive particles embedded in a binder matrix, said binder matrix formed of at least 75% by weight of a polymeric resin selected from the group containing polytetrafluoroethylene and polymonochlorotrifluoroethylene.
Claim 3
Dependent Claim
17 words
The tool according to claim 1 wherein said abrasive particles are substantially 4% by weight silica sand.
Claim 4
Dependent Claim
20 words
The tool according to claim 1 wherein said binder matrix further includes a stiffening agent for purposes of increased rigidity.
Claim 5
Dependent Claim
22 words
The tool according to claim 3 wherein said stiffening agent is ground glass and comprises substantially 15%-25% by weight of the binder.
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) | 1991-01-25 | 1991-07-27 | 1992-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-25 | 1995-07-27 | 1996-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-25 | 1999-07-27 | 2000-01-26 | $7700.00 | Window Closed / Lapsed |