Patent US3159898A successfully refreshed from Google Patents.
Patent USRE31883E successfully refreshed from Google Patents.
USRE31883E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinoid grinding wheels containing nickel-coated cubic boron nitride particles
Assignee: General Electric Co
•
Filing: 1977-12-09
•
Granted: 1985-05-14
•
Expires: 1997-12-09
Abstract
Abstract An improved resinoid grinding wheel particularly useful for the wet or dry grinding of hardened steels and steel alloys utilizes nickel-coated cubic boron nitride particles as the abrasive medium.
Inventors
- 👤 Harold P. Bovenkerk
- 👤 William A. Berecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:10
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1436; C09K3/1445; B; B24; B24D; B24D18/00; B24D18/0009; B24D3/00; B24D3/02; B24D3/20; B24D3/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
In a grinding wheel for hardened steel and steel alloys, an abrasive surface consisting of nickel-coated cubic boron nitride particles, the nickel constituting from 30 to 80 weight percent of the coated particles, said coated particles being embedded in a matrix of resinous material selected from the group consisting of phenol-formaldehyde, urea-formaldehyde, melamine-formaldehyde, epoxy, polyester, polyamide and polyimide resins, and mixtures thereof.Iadd., said wheel being formed in a mold by pressing to a stop.Iaddend..
Claim 2
Dependent Claim
74 words
In a grinding wheel for hardened steel and steel alloys, an abrasive surface consisting of nickel-coated cubic boron nitride particles, the nickel constituting from 30 to 80 weight percent of the coated particles, said coated particles being embedded in a matrix of resinous material selected from the group consisting of phenol-formaldehyde, urea-formaldehyde, melamine-formaldehyde, epoxy, polyester, polyamide and polyimide resins, and mixtures thereof.Iadd., said wheel being formed in a mold by pressing to a stop.Iaddend..
Claim 3
Dependent Claim
15 words
A grinding wheel as claimed in claim 1 wherein the resinous material is phenol formaldehyde.
Claim 4
Dependent Claim
15 words
A grinding wheel as claimed in claim 1 wherein the resinous material is a polyimide.
Claim 5
Independent Claim
91 words
A method of making an abrasive wheel for hardened steel and steel alloys comprising applying a coating of nickel to a quantity of cubic boron nitride particles, the nickel constituting about 30 to 80 weight percent of the coated particles, mixing said coated particles with resinous material, selected from the group consisting of phenol-formaldehyde, urea-formaldehyde, melamine-formaldehyde, epoxy, polyester, polyamide and polyimide resins, and mixtures thereof and forming the coated cubic boron nitride resinous material mixture as the abrasive surface of a grinding wheel .Iadd.in a mold by pressing to a stop.Iaddend..
Claim 6
Independent Claim
91 words
A method of making an abrasive wheel for hardened steel and steel alloys comprising applying a coating of nickel to a quantity of cubic boron nitride particles, the nickel constituting about 30 to 80 weight percent of the coated particles, mixing said coated particles with resinous material, selected from the group consisting of phenol-formaldehyde, urea-formaldehyde, melamine-formaldehyde, epoxy, polyester, polyamide and polyimide resins, and mixtures thereof and forming the coated cubic boron nitride resinous material mixture as the abrasive surface of a grinding wheel .Iadd.in a mold by pressing to a stop.Iaddend..
Claim 7
Dependent Claim
20 words
A .Iadd.method of making an abrasive .Iaddend.grinding wheel as claimed in claim 4 wherein the resinous material is phenol formaldehyde.
Claim 8
Dependent Claim
162 words
A .Iadd.method of making an abrasive .Iaddend.grinding wheel as claimed in claim 4 wherein the resinous material is a polyimide .Iadd.and said pressing to a stop step is carried out at 5000 p.s.i..Iaddend.. .Iadd.7. A method of grinding hardened steel and steel alloys comprising the steps of: providing an abrasive grinding wheel whose surface comprises nickel-coated cubic boron nitride particles, the nickel constituting about 30 to 80 weight percent of the coated particle, in a matrix of resinous material selected from the group consisting of phenol-formaldehyde, urea-formaldehyde, melamine-formaldehyde, epoxy, polyester, polyamide and polyimide resins, and mixtures thereof, said wheel being formed in a mold by pressing to a stop; providing a hardened steel or steel alloy workpiece; rotating said grinding wheel; and contacting said workpiece with said rotating abrasive surface, whereby said surface abrades said workpiece..Iaddend. .Iadd.8. The method of claim 7, wherein said resinous material is phenol formaldehyde..Iaddend. .Iadd.9. The method of claim 7, wherein said resinous material is a polyimide..Iaddend.
References Cited (Backward Citations)
US2947617A
Cited
US3351543A
Cited
US3904391A
Cited
US3408172A
Cited
BE698428A
Cited
US3528788A
Cited
BE724829A
Cited
US3518068A
Cited
US3645706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |