Patent US2570408A successfully refreshed from Google Patents.
US2570408A
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Process for producing mercurous chloride crystals
Assignee: Celanese Corp
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Filing: 1948-08-14
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Granted: 1951-10-09
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Expires: 1968-08-14
Abstract
No abstract record available.
Inventors
- 👤 Norman Van Gorder
- 👤 Horback William
- 👤 Amerigo F Caprio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:49
CPC Classifications
C; C01; C01G; C01G13/00; C01G13/04; C09; C09C; C09C1/00; C09C1/0015; C09C1/0018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
PROCESS FOR PRODUCING MERCUROUS CHLORIDE CRYSTALS HAVING A SILKY, NACREOUS LUSTER, WHICH COMPRISES REACTING MERCURIC CHLORIDE WITH A SOLUBLE, INORGANIC, DEBASIC PHOSPHITE AT A TEMPERATURE OF FROM 10 TO 95* C. IN A SOLUTION CONTAINING FROM ABOUT 1.5 TO 7% BY WEIGHT OF THE MERCURIC CHLORIDE, FROM ABOUT 0.3 TO 2.5% BY WEIGHT OF THE SOLUBLE, INORGANIC PHOSPHITE AND FROM ABOUT 1 TO 10% BY WEIGHT OF A CHLORIDE OF THE GROUP CONSISTING OF SODIUM AND POTASSIUM CHLORIDE AND MIXTURES THEREOF WHICH IMPROVES THE LUSTER OF THE CRYSTALS, ACIDIFYING THE REACTION MIXTURE AND WASHING THE MERCUROUS CHLORIDE CRYSTALS FORMED WITHOUT MATERIAL LOSS OF LUSTER, WITH WATER CONTAINING FROM ABOUT .001 TO 0.50% BY WEIGHT OF A MATERIAL SELECTED FROM THE CLASS CONSISTING OF PROTECTIVE COLLOIDS AND WETTING AGENTS.
Claim 2
Dependent Claim
128 words
PROCESS FOR PRODUCING MERCUROUS CHLORIDE CRYSTALS HAVING A SILKY, NACREOUS LUSTER, WHICH COMPRISES REACTING MERCURIC CHLORIDE WITH A SOLUBLE, INORGANIC, DEBASIC PHOSPHITE AT A TEMPERATURE OF FROM 10 TO 95* C. IN A SOLUTION CONTAINING FROM ABOUT 1.5 TO 7% BY WEIGHT OF THE MERCURIC CHLORIDE, FROM ABOUT 0.3 TO 2.5% BY WEIGHT OF THE SOLUBLE, INORGANIC PHOSPHITE AND FROM ABOUT 1 TO 10% BY WEIGHT OF A CHLORIDE OF THE GROUP CONSISTING OF SODIUM AND POTASSIUM CHLORIDE AND MIXTURES THEREOF WHICH IMPROVES THE LUSTER OF THE CRYSTALS, ACIDIFYING THE REACTION MIXTURE AND WASHING THE MERCUROUS CHLORIDE CRYSTALS FORMED WITHOUT MATERIAL LOSS OF LUSTER, WITH WATER CONTAINING FROM ABOUT .001 TO 0.50% BY WEIGHT OF A MATERIAL SELECTED FROM THE CLASS CONSISTING OF PROTECTIVE COLLOIDS AND WETTING AGENTS.
References Cited (Backward Citations)
US740855A
Cited
US1982280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |