Patent US3836345A successfully refreshed from Google Patents.
US3836345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated grinding wheel
Assignee: Cincinnati Ind Inc
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Filing: 1971-08-02
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Granted: 1974-09-17
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Expires: 1991-08-02
Abstract
Abstract A laminated grinding wheel composed of a plurality of plies of universally stretchable creped paper bonded together by means of a thermosetting resin, with layers of abrasive grit particles interposed between adjoining plies of the creped paper, the grit particles being embedded or nested in the gatherings of the creped sheets which effectively stretch and flex to receive the grit particles with essentially negligible puncturing of the creped paper plies as the laminated structure is molded under pressure prior to curing.
Inventors
- 👤 R Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:55
CPC Classifications
B; B24; B24D; B24D11/00; B24D5/00; B24D5/02; B24D7/00; B24D7/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
34 words
The laminated grinding wheel claimed in claim 1 wherein the grit paper plies are arranged so that their grit covered surfaces face outwardly in opposite directions from the center plane of the grinding wheel.
Claim 2
Dependent Claim
23 words
The laminated grinding wheel claimed in claim 2 wherein plies of universally stretchable mat paper are interleaved between the plies of grit paper.
Claim 3
Dependent Claim
20 words
The laminated grinding wheel claimed in claim 3 wherein the plies of mat paper are treated with a thermosetting resin.
Claim 4
Dependent Claim
46 words
The laminated grinding wheel claimed in claim 4 wherein a layer of universally stretchable mat paper is interposed between the centermost two plies of grit paper, whereby to provide three plies of universally stretchable paper in surface-to-surface contact at the approximate center plane of the wheel.
Claim 5
Dependent Claim
36 words
The laminated grinding wheel claimed in claim 5 wherein said grit paper has a stretchability both longitudinally and laterally of about 30 percent in each direction, and wherein said grit particles are of 24 grit size.
Claim 6
Dependent Claim
42 words
The laminated grinding wheel claimed in claim 6 wherein said sizing resin is a phenol formaldehyde resin and said bonding resin is an unmodified phenol formaldehyde resin containing substantially 65 percent resin and 35 percent cryolite filler, the parts being by weight.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |