US4263016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-toxic, active filler for grinding disks, its use and grinding disk containing same
Assignee: Honeywell Riedel de Haen AG
•
Filing: 1979-08-13
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Granted: 1981-04-21
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Expires: 1999-08-13
Abstract
Abstract In grinding disks, toxic lead chloride and antimony sulfide may be replaced by non-toxic alkali metal chloroferrates (II,III) produced by melting together alkali metal chloride, anhydrous ferric chloride and iron powder.
Inventors
- 👤 Rudolf Hirschberg
- 👤 Bernd Schonfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:34
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/342; B24D3/344
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
Non-toxic, active filler for grinding disks consisting essentially of an alkali metal chloroferrate (II, III) of the formula I A.sub.x Fe.sub.y.sup.++ Fe.sub.z.sup.+++ Cl.sub.x+2y+z (I) in which A means an alkali metal ion or an ammonium ion, x is a number from 1 to 10, y is a number from zero to 1, z is a number from zero to 1, with proviso that y and z cannot be zero at the same time.
Claim 2
Dependent Claim
73 words
Non-toxic, active filler for grinding disks consisting essentially of an alkali metal chloroferrate (II, III) of the formula I A.sub.x Fe.sub.y.sup.++ Fe.sub.z.sup.+++ Cl.sub.x+2y+z (I) in which A means an alkali metal ion or an ammonium ion, x is a number from 1 to 10, y is a number from zero to 1, z is a number from zero to 1, with proviso that y and z cannot be zero at the same time.
Claim 3
Dependent Claim
42 words
The filler of claim 1 wherein the alkali metal chloroferrate (II) is a compound as defined by formula I in which A means an alkali metal ion, x is a number from 1 to 6, y is 1 and z is zero.
Claim 4
Dependent Claim
20 words
The filler of claim 1 wherein the alkali metal chloroferrate (II, III) is in admixture with a basic inorganic compound.
Claim 5
Dependent Claim
18 words
Grinding disk containing as non-toxic, active filler an alkali metal chloroferrate (II, III) as defined in claim 1.
Claim 6
Dependent Claim
27 words
The filler of claim 2 wherein the filler is utilized in an amount of 3 to 15% by weight based on the weight of the grinding disk.
Claim 7
Dependent Claim
18 words
The filler of claim 3, wherein the basic inorganic compound is zinc oxide, potassium carbonate or sodium sulfide.
Claim 8
Dependent Claim
16 words
The filler of claim 1, wherein the grinding disk is a phenolic resin bonded grinding disk.
Claim 9
Dependent Claim
15 words
The filler of claim 1, wherein the alkali metal ion is lithium, sodium or potassium.
Claim 10
Dependent Claim
34 words
The filler of claim 1, wherein the alkali metal chloroferrate is a compound of the formula KFeCl 3 , K 2 FeCl 4 , Na 2 FeCl 4 or NaK 3 FeCl 6 .
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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |