Patent US2495607A successfully refreshed from Google Patents.
US2495607A
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Diamond abrasive article and method of making the same
Assignee: Saint Gobain Abrasives Inc
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Filing: 1948-08-03
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Granted: 1950-01-24
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Expires: 1968-08-03
Abstract
No abstract record available.
Inventors
- 👤 Reinhold A Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:13
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; C; C04; C04B; C04B14/00; C04B14/02; C04B14/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A DIAMOND ABRASIVE ARTICLE COMPRISING DIAMOND GRAINS FREE FROM DETRIMENTAL OXIDATION HELD IN A SUBSTANTIALLY UNSWELLED VITRIFIED BOND STRUCTURE THAT COMPRISES PRE-FIRED LEAD SILICATE GLASS CONSISTING ESSENTIALLY OF BY WEIGHT SILICA 25% TO 60% AND LEAD OXIDE 40% TO 70% THE ARTICLE BEING VITRIFIED AT AND ITS BOND HAVING A MATURING TEMPERATURE BETWEEN 500*C. AND 750*C. AND SAID GLASS HAVING BEEN MADE BY PREFIRING AT A TEMPERATURE ABOVE THAT EMPLOYED IN MATURING THE ARTICLE, AND SAID ARTICLE HAVING A VOLUME PRECENTAGE OF POROSITY NOT GREATER THAN 15 VOLUME PERCENT.
Claim 2
Dependent Claim
89 words
A DIAMOND ABRASIVE ARTICLE COMPRISING DIAMOND GRAINS FREE FROM DETRIMENTAL OXIDATION HELD IN A SUBSTANTIALLY UNSWELLED VITRIFIED BOND STRUCTURE THAT COMPRISES PRE-FIRED LEAD SILICATE GLASS CONSISTING ESSENTIALLY OF BY WEIGHT SILICA 25% TO 60% AND LEAD OXIDE 40% TO 70% THE ARTICLE BEING VITRIFIED AT AND ITS BOND HAVING A MATURING TEMPERATURE BETWEEN 500*C. AND 750*C. AND SAID GLASS HAVING BEEN MADE BY PREFIRING AT A TEMPERATURE ABOVE THAT EMPLOYED IN MATURING THE ARTICLE, AND SAID ARTICLE HAVING A VOLUME PRECENTAGE OF POROSITY NOT GREATER THAN 15 VOLUME PERCENT.
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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) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |