Patent US4021209A successfully refreshed from Google Patents.
US4021209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aramid fiber reinforced abrasive wheel
Assignee: NATIONAL GRINDING WHEEL Co Inc
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Filing: 1975-07-23
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Granted: 1977-05-03
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Expires: 1995-07-23
Abstract
Abstract An improved abrasive grinding wheel such as a cutoff or snagging wheel, including a reinforcing fabric of aramid fibers.
Inventors
- 👤 Howard J. R. Binkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:24
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/342; B24D3/344; B24D5/00; B24D5/02; B24D5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
An abrasive wheel comprising a core portion and a grinding surface portion comprising a mass of abrasive material, synthetic resin binder, and aramid reinforcing fibers said aramid reinforcing fibers are in the form of a woven open-mesh fabric, said fabric being positioned as at least one uniform radial layer perpendicular to the axis of rotation of said wheel.
Claim 2
Dependent Claim
58 words
An abrasive wheel comprising a core portion and a grinding surface portion comprising a mass of abrasive material, synthetic resin binder, and aramid reinforcing fibers said aramid reinforcing fibers are in the form of a woven open-mesh fabric, said fabric being positioned as at least one uniform radial layer perpendicular to the axis of rotation of said wheel.
References Cited (Backward Citations)
US2698504A
Cited
US3116986A
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US3487589A
Cited
US3540163A
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US3888965A
Cited
US3719007A
Cited
US3867795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |