Patent US2509652A successfully refreshed from Google Patents.
US2509652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing abrasive articles
Assignee: Unifrax I LLC
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Filing: 1947-07-15
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Granted: 1950-05-30
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Expires: 1967-07-15
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Rushmer
- 👤 George J Goepfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:09
CPC Classifications
B; B24; B24D; B24D18/00; Y; Y10; Y10S; Y10S264/00; Y10S264/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A METHOD OF MAKING A MOLDED ABRASIVE ARTICLE THE STEPS WHICH COMPRISE PREPARING A MIXTURE BY COATING ABRASIVE GRAINS WITH A RESIN SOLVENT AND MIXING THE COATED GRAINS FIRST WITH A HEAT-SOFTENABLE RESIN BOND AND THEN WITH FINELY DIVIDED ELECTRICALLY CONDUCTIVE CARBON, FORMING AN ARTICLE FROM THE MIXTURE IN A MOLD, REMOVING THE FORMED ARTICLE FROM THE MOLD, PASSING AN ELECTRIC CURRENT THROUGH THE ARTICLE TO HEAT IT AND CAUSE THE RESIN TO SOFTEN, AND PLACING THE HEATED ARTICLE IN A MOLD AND AGAIN PRESSING IT WHILE THE RESIN IS STILL SOFT.
Claim 2
Dependent Claim
93 words
IN A METHOD OF MAKING A MOLDED ABRASIVE ARTICLE THE STEPS WHICH COMPRISE PREPARING A MIXTURE BY COATING ABRASIVE GRAINS WITH A RESIN SOLVENT AND MIXING THE COATED GRAINS FIRST WITH A HEAT-SOFTENABLE RESIN BOND AND THEN WITH FINELY DIVIDED ELECTRICALLY CONDUCTIVE CARBON, FORMING AN ARTICLE FROM THE MIXTURE IN A MOLD, REMOVING THE FORMED ARTICLE FROM THE MOLD, PASSING AN ELECTRIC CURRENT THROUGH THE ARTICLE TO HEAT IT AND CAUSE THE RESIN TO SOFTEN, AND PLACING THE HEATED ARTICLE IN A MOLD AND AGAIN PRESSING IT WHILE THE RESIN IS STILL SOFT.
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) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |