Patent US4787362A successfully refreshed from Google Patents.
US4787362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive blade having a polycrystalline ceramic core
Assignee: Thermocarbon Inc
•
Filing: 1988-04-01
•
Granted: 1988-11-29
•
Expires: 2008-04-01
Abstract
Abstract An abrasive cutting blade having very high rigidity, has a core which is a disc of low porosity, polycrystalline structural ceramic and an abrasive material adhered to the periphery thereof. The structural ceramic may be conductive or non-conductive and the abrasive may be adhered by resin bonding, electroplating, sintering or pressing.
Inventors
- 👤 John N. Boucher
- 👤 David E. Bajune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:22
CPC Classifications
B; B23; B23D; B23D61/00; B23D61/02; B23D61/028; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/14; B24D3/18; B24D5/00; B24D5/12; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B28D1/121
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
76 words
An abrasive dicing blade comprising: an annular disc less than 0.025 in. in thickness, said disc having an inner and an outer diameter, and being formed from a fine grain, low porosity, polycrystalline, non-conductive, structural ceramic, and an abrasive material, which is a polymerized resin matrix in which abrasive particles are embedded, adhered to an outer peripheral surface of said annular disc, said abrasive material having a thickness greater than the thickness of said annular disc.
Claim 2
Dependent Claim
76 words
An abrasive dicing blade comprising: an annular disc less than 0.025 in. in thickness, said disc having an inner and an outer diameter, and being formed from a fine grain, low porosity, polycrystalline, non-conductive, structural ceramic, and an abrasive material, which is a polymerized resin matrix in which abrasive particles are embedded, adhered to an outer peripheral surface of said annular disc, said abrasive material having a thickness greater than the thickness of said annular disc.
Claim 3
Dependent Claim
14 words
An abrasive dicing according to claim 1 wherein said abrasive material contains diamond particles.
Claim 4
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said abrasive material contains silicon carbide particles.
Claim 5
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said abrasive material contains boron nitride particles.
Claim 6
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said abrasive material contains aluminum oxide particles.
Claim 7
Dependent Claim
17 words
An abrasive dicing blade according to claim 1 wherein said polymerized resin matrix is a thermosetting phenolic.
Claim 8
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said polymerized resin matrix is an epoxide.
Claim 9
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said polymerized resin matrix is a polyimide.
Claim 10
Dependent Claim
26 words
An abrasive dicing blade according to claim 1 wherein said ceramic disc has a Young's Modulus of Elasticity equal to or greater than 30×10 6 psi.
Claim 11
Dependent Claim
15 words
An abrasive dicing blade according to claim 1 wherein said non-conductive cermaic is aluminum oxide.
Claim 12
Dependent Claim
15 words
An abrasive dicing blade according to claim 1 wherein said non-conductive ceramic is silicon carbide.
Claim 13
Dependent Claim
15 words
An abrasive dicing blade according to claim 1 wherein said non-conductive ceramic is silicon nitride.
Claim 14
Dependent Claim
18 words
An abrasive dicing blade according to claim 1, wherein said non-conductive ceramic is coated with a conductive material.
Claim 15
Dependent Claim
24 words
An abrasive dicing blade according to claim 1 wherein the width of said abrasive material is greater than the width of said ceramic disc.
Claim 16
Independent Claim
60 words
A method for making an abrasive dicing blade comprising: (a) forming a disc less than 0.025 in thick of fine grain, low porosity, polycrystalline, non-conductive, structural ceramic, said disc having an inner and outer diameter; (b) adhering an abrasive material which is a polymerized resin matrix in which abrasive particles are embedded to an outer circumferential periphery of said disc.
Claim 17
Independent Claim
60 words
A method for making an abrasive dicing blade comprising: (a) forming a disc less than 0.025 in thick of fine grain, low porosity, polycrystalline, non-conductive, structural ceramic, said disc having an inner and outer diameter; (b) adhering an abrasive material which is a polymerized resin matrix in which abrasive particles are embedded to an outer circumferential periphery of said disc.
Claim 18
Dependent Claim
25 words
A method according to claim 15 further comprising forming at least one step on each side of the outer circumferential periphery of said ceramic disc.
Claim 19
Dependent Claim
20 words
A method according to claim 15 further comprising forming a plurality of notches in the periphery of said ceramic disc.
Claim 20
Dependent Claim
24 words
A method according to claim 15 wherein said disc of structural ceramic is formed by cutting a disc from a sheet of structural ceramic.
Claim 21
Dependent Claim
19 words
A method according to claim 15 wherein said abrasive material is adhered to said ceramic disc by adhesive bonding.
Claim 22
Dependent Claim
42 words
A method according to claim 15 wherein in said abrasive material comprises abrasive hard particles in a polymeric resin and the resin is adhered to the outer peripheral circumference of said ceramic disc by molding said abrasive material on said ceramic disc.
References Cited (Backward Citations)
US2281526A
Cited
US3271911A
Cited
US3640027A
Cited
US3745623A
Cited
US3765132A
Cited
US4496372A
Cited
US4505721A
Cited
US4409003A
Cited
US4449939A
Cited
US4441894A
Cited
US4469489A
Cited
US4557244A
Cited
US4634453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |