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Patent US5049166A successfully refreshed from Google Patents.
US5049166A
Expired / Lapsed
US
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Light weight abrasive tumbling media and method of making same
Assignee: Washington Mills Ceramics Corp
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Filing: 1990-02-27
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Granted: 1991-09-17
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Expires: 2010-02-27
Abstract
Abstract The present invention provides a method for manufacturing light weight abrasive tumbling media made up of discrete abrasive particles desirably exhibiting an essentially uniform size and shape which comprises adding at least 15%, and preferably 20% by weight of a naturally occurring or synthetically produced metal carbonate to a ceramic/clay based formable mixture prior to firing to obtain particles having a final fired bulk density below 65 lbs/ft 3 . Such a carbonate may desirably be selected from the group consisting of calcium carbonate, lithium carbonate, magnesium carbonate, zinc carbonate or compounds containing a predominant amount of one or more of these carbonates.
Inventors
- 👤 Gregory S. Kirkendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:24
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/346; C; C04; C04B; C04B33/00; C04B33/02; C04B33/04; C09; C09K; C09K3/00; C09K3/14; C09K3/1409; C09K3/1418
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
70 words
A method for manufacturing abrasive tumbling media consisting of discrete abrasive particles having an essentially uniform size and shape made by firing a formable mixture primarily comprising a clay, a ceramic and mixtures thereof, which method comprises adding at least 15% of a naturally occurring or synthetically produced metal carbonate to said mixture prior to firing to obtain particles having a final fired bulk density below 65 lbs/ft 3 .
Claim 2
Independent Claim
70 words
A method for manufacturing abrasive tumbling media consisting of discrete abrasive particles having an essentially uniform size and shape made by firing a formable mixture primarily comprising a clay, a ceramic and mixtures thereof, which method comprises adding at least 15% of a naturally occurring or synthetically produced metal carbonate to said mixture prior to firing to obtain particles having a final fired bulk density below 65 lbs/ft 3 .
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein the carbonate is selected from the group consisting of calcium carbonate, lithium carbonate, magnesium carbonate, zinc carbonate or compounds containing a predominant amount of one or more of these carbonates.
Claim 4
Dependent Claim
17 words
The method of claim 2 wherein said mixture contains about 15% to about 25% of the carbonate.
Claim 5
Dependent Claim
20 words
The method of claim 3 wherein the final fired bulk density of said particles is between 50-65 lbs/ft 3 .
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein the metal carbonate is selected from the group consisting of calcium carbonate, ground marble and calcite.
Claim 7
Dependent Claim
11 words
Ceramic abrasive tumbling media made by the process of claim 1.
Claim 8
Dependent Claim
18 words
A composition comprising clay, ceramic and mixtures thereof and at least fifteen weight percent of a metal carbonate.
Claim 9
Dependent Claim
18 words
A composition comprising clay, ceramic and mixtures thereof and at least fifteen weight percent of a metal carbonate.
Claim 10
Dependent Claim
31 words
The method of claim 1 wherein said formable mixture is first extruded into a continuous rod having a desired shape which is thereafter cut into the desired length prior to firing.
Claim 11
Dependent Claim
30 words
The method of claim 1 wherein said formable mixture is first extruded into a continuous rod which is thereafter press formed into the desired size and shape prior to firing.
Claim 12
Dependent Claim
30 words
The method of claim 2 wherein said formable mixture is first extruded into a continuous rod which is thereafter press formed into the desired size and shape prior to firing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |