Patent US907629A successfully refreshed from Google Patents.
Patent US3305845A successfully refreshed from Google Patents.
Patent US2903434A successfully refreshed from Google Patents.
US2903434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decolorizing clays
Assignee: International Minerals and Chemical Corp
•
Filing: 1957-04-22
•
Granted: 1959-09-08
•
Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Gloss Frithie
- 👤 Ittlinger Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:41
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
AN IMPROVED PROCESS FOR THE ACTIVATION OF MONTMORILLONITE CLAY WHICH IS USEFUL IN THE DECLORIZING OF OILS AND WHICH COMPRISES THE STEPS OF REACTING CLAY BY SLURRYING SAID CLAY WITH AN ACIDIC AQUEOUS SOLUTION CONTAINING AN INORGANIC FLUORINE-CONTAINING SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN FLUORIDE, FLUOSILICIC ACID, AND SUBSTANCES AFFORDING HYDROGEN FLUORIDE AND FLUOSILICIC ACID IN THE PRESENCE OF A MINERAL ACID, AND A MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, SULFURIC ACID, AND PHOSPHORIC ACID, AND MIXTURES OF AT LEAST TWO OF THESE MINERAL ACID, AND A MINTHE CLAY FROM SAID ACIDIC SOLUTION, WASHING THE CLAY WITH WATER UNTIL SUBSTANTIALLY FREE OF SAID ACIDIC SOLUTION AND HEATING THE CLAY TO DRYNESS.
Claim 2
Dependent Claim
117 words
AN IMPROVED PROCESS FOR THE ACTIVATION OF MONTMORILLONITE CLAY WHICH IS USEFUL IN THE DECLORIZING OF OILS AND WHICH COMPRISES THE STEPS OF REACTING CLAY BY SLURRYING SAID CLAY WITH AN ACIDIC AQUEOUS SOLUTION CONTAINING AN INORGANIC FLUORINE-CONTAINING SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN FLUORIDE, FLUOSILICIC ACID, AND SUBSTANCES AFFORDING HYDROGEN FLUORIDE AND FLUOSILICIC ACID IN THE PRESENCE OF A MINERAL ACID, AND A MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, SULFURIC ACID, AND PHOSPHORIC ACID, AND MIXTURES OF AT LEAST TWO OF THESE MINERAL ACID, AND A MINTHE CLAY FROM SAID ACIDIC SOLUTION, WASHING THE CLAY WITH WATER UNTIL SUBSTANTIALLY FREE OF SAID ACIDIC SOLUTION AND HEATING THE CLAY TO DRYNESS.
References Cited (Backward Citations)
US1544210A
Cited
US2034996A
Cited
US2207145A
Cited
US2333500A
Cited
US2450317A
Cited
US2504618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |