Patent US2494215A successfully refreshed from Google Patents.
US2494215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromate production
Assignee: Individual
•
Filing: 1949-05-12
•
Granted: 1950-01-10
•
Expires: 1969-05-12
Abstract
No abstract record available.
Inventors
- 👤 Marvin J Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:58
CPC Classifications
C; C01; C01G; C01G37/00; C01G37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A CYCLIC PROCESS FOR PRODUCING CALCIUM CHROMATE WHICH COMPRISES (1) REACTING SODIUM NITRATE AND AMMONIUM BICARBONATE TO PRODUCE SODIUM BICARBONATE AND AMMONIUM NITRATE, (2) REGENERATING THE AMMONIUM BICARBONATE BY REACTING THE AMMONIUM NITRATE WITH CALCIUM HYDROXIDE WITH THE PRODUCTION OF AMMONIA AND CALCIUM NITRATE AND REACTING THE AMMONIA THUS PRODUCED WITH CARBON DIOXIDE IN AN AQUEOUS LIQUID, (3) PRODUCING CALCIUM CHROMATE AND SIMULTANEOUSLY REGENERATING THE SODIUM NITRATE BY REACTING CHROMIC OXIDE WITH THE SODIUM OXIDE OF THE SODIUM BICARBONATE UNDER OXIDIZING CONDITIONS TO FORM SODIUM CHROMATE AND REACTING THE SODIUM CHROMATE WITH CALCIUM NITRATE PRODUCED IN REGENERATING THE AMMONIUM BICARBONATE, (4) SEPARATING THE CALCIUM CHROMATE FROM THE REGENERATED SODIUM CHLORIDE, AND (5) UTILIZING UTILIZING REGENERATED SODIUM NITRATE AND THE REGENERATED AMMONIUM BICARBONATE TO REGENERATE SODIUM BICARBONATE FOR USE IN THE PRODUCTION OF ADDITIONAL CALCIUM CHROMATE.
Claim 2
Dependent Claim
135 words
A CYCLIC PROCESS FOR PRODUCING CALCIUM CHROMATE WHICH COMPRISES (1) REACTING SODIUM NITRATE AND AMMONIUM BICARBONATE TO PRODUCE SODIUM BICARBONATE AND AMMONIUM NITRATE, (2) REGENERATING THE AMMONIUM BICARBONATE BY REACTING THE AMMONIUM NITRATE WITH CALCIUM HYDROXIDE WITH THE PRODUCTION OF AMMONIA AND CALCIUM NITRATE AND REACTING THE AMMONIA THUS PRODUCED WITH CARBON DIOXIDE IN AN AQUEOUS LIQUID, (3) PRODUCING CALCIUM CHROMATE AND SIMULTANEOUSLY REGENERATING THE SODIUM NITRATE BY REACTING CHROMIC OXIDE WITH THE SODIUM OXIDE OF THE SODIUM BICARBONATE UNDER OXIDIZING CONDITIONS TO FORM SODIUM CHROMATE AND REACTING THE SODIUM CHROMATE WITH CALCIUM NITRATE PRODUCED IN REGENERATING THE AMMONIUM BICARBONATE, (4) SEPARATING THE CALCIUM CHROMATE FROM THE REGENERATED SODIUM CHLORIDE, AND (5) UTILIZING UTILIZING REGENERATED SODIUM NITRATE AND THE REGENERATED AMMONIUM BICARBONATE TO REGENERATE SODIUM BICARBONATE FOR USE IN THE PRODUCTION OF ADDITIONAL CALCIUM CHROMATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |