Patent US2762689A successfully refreshed from Google Patents.
US2762689A
Expired / Lapsed
US
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Manufacture of hydrogen chloride
Assignee: Ethyl Corp
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Filing: 1954-03-10
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Granted: 1956-09-11
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Expires: 1974-03-10
Abstract
No abstract record available.
Inventors
- 👤 Albert P Giraitis
- 👤 Arthur F Limper
- 👤 Martin B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:33
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01; C01B7/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE PROCESS OF MAKING CONCENTRATED AND ANHYDROUS HYDROGEN CHLORIDE AND ANHYDROUS SODIUM SULFATE COMPRISING REACTING CONCENTRATED SULFURIC ACID, HAVING A CONCENTRATION OF AT LEAST 90 WEIGHT PERCENT H2SO4, WITH SODIUM CHLORIDE, IN THE PROPORTIONS OF ONE MOLE OF ACID TO TWO MOLES OF SODIUM CHLORIDE AND AT A TEMPERATURE OF ABOUT 200* TO 250* C. AND IN A REACTION MEDIUM CONSISTING ESSENTIALLY OF FROM 70 TO 81 PERCENT BY WEIGHT OF SODIUM BISULFATE, FROM 17 TO 26 PERCENT SODIUM SULFATE AND FROM 2 TO 5 PERCENT WATER.
Claim 2
Dependent Claim
87 words
THE PROCESS OF MAKING CONCENTRATED AND ANHYDROUS HYDROGEN CHLORIDE AND ANHYDROUS SODIUM SULFATE COMPRISING REACTING CONCENTRATED SULFURIC ACID, HAVING A CONCENTRATION OF AT LEAST 90 WEIGHT PERCENT H2SO4, WITH SODIUM CHLORIDE, IN THE PROPORTIONS OF ONE MOLE OF ACID TO TWO MOLES OF SODIUM CHLORIDE AND AT A TEMPERATURE OF ABOUT 200* TO 250* C. AND IN A REACTION MEDIUM CONSISTING ESSENTIALLY OF FROM 70 TO 81 PERCENT BY WEIGHT OF SODIUM BISULFATE, FROM 17 TO 26 PERCENT SODIUM SULFATE AND FROM 2 TO 5 PERCENT WATER.
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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |