Patent FR2600526A1 successfully refreshed from Google Patents.
US2704261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machinable ceramic and process of manufacture
Assignee: Individual
•
Filing: 1952-08-06
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Granted: 1955-03-15
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Expires: 1972-08-06
Abstract
No abstract record available.
Inventors
- 👤 Jay E Comeforo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:07
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B2111/00; C04B2111/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE PROCESS OF PRODUCING A MACHINABLE MICACERAMIC WHICH COMPRISES MIXING ABOUT 85 TO 98 PERCENT BY WEIGHT OF FINELY DIVIDED SYNTHETIC FLUORINE-MICA OF THE APPROXIMATE COMPOSITION KMG21/2 SI4O10F2 AND OF A FINENESS OF ABOUT MINUS 60 MESH WITH ABOUT 2 TO 15 PERCENT BY WEIGHT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ORTHOPHOSPHORIC ACID AND SALTS THEREOF , FORMING THE MIXTURE INTO A CERAMIC ARTICLE BY COLD PRESSING, AND THEREAFTER HEAT-FIRING THE FORMED ARTICLE AT A TEMPERATURE OF FROM ABOUT 900* C. TO 1300* C. AT ATMOSPHERIC PRESSURE TO COMPLETE THE CHEMICAL BOND OF THE PHOSPHATE WITH THE MICA.
Claim 2
Dependent Claim
101 words
THE PROCESS OF PRODUCING A MACHINABLE MICACERAMIC WHICH COMPRISES MIXING ABOUT 85 TO 98 PERCENT BY WEIGHT OF FINELY DIVIDED SYNTHETIC FLUORINE-MICA OF THE APPROXIMATE COMPOSITION KMG21/2 SI4O10F2 AND OF A FINENESS OF ABOUT MINUS 60 MESH WITH ABOUT 2 TO 15 PERCENT BY WEIGHT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ORTHOPHOSPHORIC ACID AND SALTS THEREOF , FORMING THE MIXTURE INTO A CERAMIC ARTICLE BY COLD PRESSING, AND THEREAFTER HEAT-FIRING THE FORMED ARTICLE AT A TEMPERATURE OF FROM ABOUT 900* C. TO 1300* C. AT ATMOSPHERIC PRESSURE TO COMPLETE THE CHEMICAL BOND OF THE PHOSPHATE WITH THE MICA.
References Cited (Backward Citations)
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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) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |