US2539486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of reclaim porcelain enamel
Assignee: Vibrantz Corp
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Filing: 1946-04-26
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Granted: 1951-01-30
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Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 Donald W Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:57
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/002; B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2201/00; B03D2201/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A METHOD FOR RECLAIMING FRIT FROM A PREVIOUSLY MILLED PORCELAIN ENAMEL MASS WHICH CONTAINS A SUBSTANTIAL PORTION OF CLAY, WHICH COMPRISES PASSING THE ENAMEL MASS THROUGH AT LEAST A 150 MESH SCREEN TO SUBSTANTIALLY COMPLETELY REMOVE ALL PARTICLES GREATER THAN 60 TO 74 MICRONS IN SIZE, AND THEN BY THE PROCESS OF MULTICELL FROTH FLOTATION SEPARATING THE MAJOR PROPORTION OF SUCH CLAY FROM THE FRIT, SUCH FROTH FLOTATION PROCESS CHARACTERIZED IN THAT AT LEAST 40% AND NOT MORE THAN 75% OF THE TOTAL WEIGHT OF THE AMINE COLLECTOR USED IS INTRODUCED IN THE FIRST CELL, WHEREBY EXCESSIVE FROTHING IS PREVENTED WHICH WOULD OTHERWISE CARRY OVER A SUBSTANTIAL PORTION OF THE FRIT FINES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |