Patent US2718686A successfully refreshed from Google Patents.
US2718686A
Expired / Lapsed
US
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Process for the manufacture of filter porcelains
Assignee: Individual
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Filing: 1954-04-16
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Granted: 1955-09-27
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Expires: 1974-04-16
Abstract
No abstract record available.
Inventors
- 👤 Garbati Alfredo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:26
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B38/00; C04B41/45; C04B41/50; C04B41/5025; C04B41/5035; C04B41/80; C04B41/81; C04B41/85; C04B41/87
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS FOR THE MANUFACTURE OF A PORCELAIN FILTER COMPRISING MOLDING INTO A DESIRED PIECE A MIXTURE COMPRISING ABOUT 85% QUARTZ PARTICLES AND ABOUT 15% POTASSIUM SODIUM SULFATE PARTICLES, FIRING THE MOLDED PIECE AT A TEMPERATURE OF ABOUT 1250* TO 1300* C. UNTIL PARTICLES OF THE MOLDED PIECE FLUX AND FORM A COMPACT POROUS MASS, AND THEN SLOWLY COOLING THE PIECE,
Claim 2
Dependent Claim
61 words
A PROCESS FOR THE MANUFACTURE OF A PORCELAIN FILTER COMPRISING MOLDING INTO A DESIRED PIECE A MIXTURE COMPRISING ABOUT 85% QUARTZ PARTICLES AND ABOUT 15% POTASSIUM SODIUM SULFATE PARTICLES, FIRING THE MOLDED PIECE AT A TEMPERATURE OF ABOUT 1250* TO 1300* C. UNTIL PARTICLES OF THE MOLDED PIECE FLUX AND FORM A COMPACT POROUS MASS, AND THEN SLOWLY COOLING THE PIECE,
References Cited (Backward Citations)
US1991918A
Cited
US2681865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |