US3202518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making high surface area ceramics
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1961-06-05
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Granted: 1965-08-24
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Expires: 1981-06-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Osgood J Whittemore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:13
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF MAKING A POROUS CERAMIC MATERIAL OF HIGH SURFACE AREA COMPRISING FIRING A MIXTURE OF SILICATE MINERAL AND AN ACID DECOMPOSABLE CARBONATE AT A TEMPERATURE ABOVE 600*C. AND BELOW THAT OF VITRIFICATION OF THE SILICATE MINERAL, AND ACID LEACHING THE FIRED PRODUCT WHEREBY THE SURFACE AREA OF THE FIRED PRODUCT IS SIGNIFICANTLY INCREASED.
Claim 2
Independent Claim
55 words
A METHOD OF MAKING A POROUS CERAMIC MATERIAL OF HIGH SURFACE AREA COMPRISING FIRING A MIXTURE OF SILICATE MINERAL AND AN ACID DECOMPOSABLE CARBONATE AT A TEMPERATURE ABOVE 600*C. AND BELOW THAT OF VITRIFICATION OF THE SILICATE MINERAL, AND ACID LEACHING THE FIRED PRODUCT WHEREBY THE SURFACE AREA OF THE FIRED PRODUCT IS SIGNIFICANTLY INCREASED.
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |