US2802718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic treatment of ores
Assignee: Individual
•
Filing: 1955-03-18
•
Granted: 1957-08-13
•
Expires: 1975-03-18
Abstract
No abstract record available.
Inventors
- 👤 George A Zotos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:07
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD OF TREATING A TUNGSTEN ORE, WHICH CONSISTS IN CONTACTING AND REACTING SAID ORE WITH AN AQUEOUS SOLUTION OF THE HYDROXIDE OF AN ALKALI METAL AND OF A CATALYST WHICH HAS (COOX-) ANION, THE WEIGHT OF SAID HYDROXIDE BEING SUBSTANTIALLY 18% TO 25% OF THE WEIGHT OF THE WATER OF SAID SOLUTION, SAID (COOX-) ANIOM BEING A SUBSTITUTED CARBOXYLIC GROUP WHOSE CARBOXYLIC HYDROGEN HAS BEEN REPLACED ONLY BY A METAL ATOM OF A METAL OF THE ALKALI GROUP DESIGNATED AS "X," THE WEIGHT OF SAID CATALYST BEING AT LEAST ONE PERCENT OF THE WEIGHT OF THE WATER OF SAID SOLUTION, AND STIRRING AND REACTING SAID ORE WITH SAID SOLUTION AT SUBSTANTIALLY 100*C.-108*C. AND AT A PRESSURE OF SUBSTANTIALLY 760 MILLIMETERS OF MERCURY, TO FORM A TUNGSTEN SALT WHICH IS DISSOLVED AND STABLE IN SAID SOLUTION.
Claim 2
Independent Claim
136 words
A METHOD OF TREATING A TUNGSTEN ORE, WHICH CONSISTS IN CONTACTING AND REACTING SAID ORE WITH AN AQUEOUS SOLUTION OF THE HYDROXIDE OF AN ALKALI METAL AND OF A CATALYST WHICH HAS (COOX-) ANION, THE WEIGHT OF SAID HYDROXIDE BEING SUBSTANTIALLY 18% TO 25% OF THE WEIGHT OF THE WATER OF SAID SOLUTION, SAID (COOX-) ANIOM BEING A SUBSTITUTED CARBOXYLIC GROUP WHOSE CARBOXYLIC HYDROGEN HAS BEEN REPLACED ONLY BY A METAL ATOM OF A METAL OF THE ALKALI GROUP DESIGNATED AS "X," THE WEIGHT OF SAID CATALYST BEING AT LEAST ONE PERCENT OF THE WEIGHT OF THE WATER OF SAID SOLUTION, AND STIRRING AND REACTING SAID ORE WITH SAID SOLUTION AT SUBSTANTIALLY 100*C.-108*C. AND AT A PRESSURE OF SUBSTANTIALLY 760 MILLIMETERS OF MERCURY, TO FORM A TUNGSTEN SALT WHICH IS DISSOLVED AND STABLE IN SAID SOLUTION.
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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |