Patent US3193344A successfully refreshed from Google Patents.
US3193344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bleaching clay
Assignee: JM Huber Corp
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Filing: 1962-03-26
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Granted: 1965-07-06
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Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Iannicelli Joseph
- 👤 Aboytes Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:05
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/10; C04B33/04; C04B33/06; C04B33/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
PROCESS FOR THE TREATMENT OF CLAY TO IMPROVE THE COLOR THEREOF WHICH COMPRISES CONTACTING AN AQUEOUS SUSPENSION OF THE CLAY WITH A REDUCING COMPOUND CAPABLE OF REDUCING THE FERRIC IRON IMPURITIES OF THE CLAY TO FERROUS IRON AND THEN ADDING A WATER SOLUBLE POLYFUNCTIONAL ORGANIC CHELATING AGENT CAPABLE OF FORMING A COMPLEX WITH THE FERROUS IRON, SAID COMPLEX BEING SEPARABLE FROM THE CLAY SAID CHELATING AGENT CONTAINING AS ONE ACTIVE RADICAL, A MERCAPTO GROUP, AND A SECOND ACTIVE RADICAL SELECTED FROM THE GROUP CONSISTING OF CARBOXY AND HYDROXY RADICALS, AND FINALLY SEPARATING THE IRON COMPLEX FROM THE CLAY.
Claim 2
Dependent Claim
98 words
PROCESS FOR THE TREATMENT OF CLAY TO IMPROVE THE COLOR THEREOF WHICH COMPRISES CONTACTING AN AQUEOUS SUSPENSION OF THE CLAY WITH A REDUCING COMPOUND CAPABLE OF REDUCING THE FERRIC IRON IMPURITIES OF THE CLAY TO FERROUS IRON AND THEN ADDING A WATER SOLUBLE POLYFUNCTIONAL ORGANIC CHELATING AGENT CAPABLE OF FORMING A COMPLEX WITH THE FERROUS IRON, SAID COMPLEX BEING SEPARABLE FROM THE CLAY SAID CHELATING AGENT CONTAINING AS ONE ACTIVE RADICAL, A MERCAPTO GROUP, AND A SECOND ACTIVE RADICAL SELECTED FROM THE GROUP CONSISTING OF CARBOXY AND HYDROXY RADICALS, AND FINALLY SEPARATING THE IRON COMPLEX FROM THE CLAY.
References Cited (Backward Citations)
GB191402309A
Cited
US1588956A
Cited
US2339594A
Cited
US2339595A
Cited
US2500727A
Cited
GB886653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |