Patent US2525324A successfully refreshed from Google Patents.
US2525324A
Expired / Lapsed
US
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Method of producing ceramic gauges
Assignee: Individual
•
Filing: 1945-11-27
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Granted: 1950-10-10
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Expires: 1965-11-27
Abstract
No abstract record available.
Inventors
- 👤 Twells Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:36
CPC Classifications
B; B28; B28B; B28B1/00; G; G01; G01B; G01B3/00; G01B3/46; G01B3/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
THE METHOD OF MAKING A SYNTHETIC CERAMIC GAUGE COMPRISING BINDING TOGETHER INTO A BLANK A MIXTURE OF FINELY DIVIDED PARTICLES OF ALUMINUM OXIDE HAVING A HIGH TEMPERATURE OF FUSION AND A HARDNESS OVER MOH''S SCALE 8 WITH SMALL AMOUNTS OF FINELY DIVIDED CERAMIC FLUXES, SHAPING THE BLANK TO A PREDETERMINED COUNTOUR AND OVERSIZE TO ALLOW FOR SHRINKAGE DURING FIRING AND A SMALL AMOUNT OF EXTRA MATERIAL, FIRING THE SHAPED BLANK AT A TEMPERATURE OF AT LEAST 1500*C. BUT BELOW THE TEMPERATURE OF THE FUSION OF THE ALUMINUM OXIDE PRODUCING THEREBY A BODY COMPRISING PARTICLES OF ALUMINUM OXIDE BONDED TOGETHER BY A GLASSY MATRIX, AND REMOVING BY GRINDING THE EXTRA MATERIAL TO FORM A GAUGE HAVING A GAUGING SURFACE OF A PREDETERMINED FINAL SIZE CONSISTING PREDOMINANTLY OF PARTICLES OF ALUMINUM OXIDE.
Claim 2
Independent Claim
130 words
THE METHOD OF MAKING A SYNTHETIC CERAMIC GAUGE COMPRISING BINDING TOGETHER INTO A BLANK A MIXTURE OF FINELY DIVIDED PARTICLES OF ALUMINUM OXIDE HAVING A HIGH TEMPERATURE OF FUSION AND A HARDNESS OVER MOH''S SCALE 8 WITH SMALL AMOUNTS OF FINELY DIVIDED CERAMIC FLUXES, SHAPING THE BLANK TO A PREDETERMINED COUNTOUR AND OVERSIZE TO ALLOW FOR SHRINKAGE DURING FIRING AND A SMALL AMOUNT OF EXTRA MATERIAL, FIRING THE SHAPED BLANK AT A TEMPERATURE OF AT LEAST 1500*C. BUT BELOW THE TEMPERATURE OF THE FUSION OF THE ALUMINUM OXIDE PRODUCING THEREBY A BODY COMPRISING PARTICLES OF ALUMINUM OXIDE BONDED TOGETHER BY A GLASSY MATRIX, AND REMOVING BY GRINDING THE EXTRA MATERIAL TO FORM A GAUGE HAVING A GAUGING SURFACE OF A PREDETERMINED FINAL SIZE CONSISTING PREDOMINANTLY OF PARTICLES OF ALUMINUM OXIDE.
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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) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |