US2656249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of a sodium bisulfite solution
Assignee: Rayonier Inc
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Filing: 1950-07-15
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Granted: 1953-10-20
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Expires: 1970-07-15
Abstract
No abstract record available.
Inventors
- 👤 Gray Kenneth Russell
- 👤 Crosby Hartzell Lance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:35
CPC Classifications
C; C01; C01D; C01D5/00; C01D5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR THE PREPARATION OF A SODIUM BISULFITE SOLUTION WHICH COMPRISES TREATING SOLUTION CONTAINING A SODIUM SALT OF A WEAKLY ACIDIC VOLATILE ACID OF THE GROUP CONSISTING OF HYDROGEN SULFIDE AND CARBONIC ACID WITH A CATION EXCHANGE RESIN HAVING ACTIVE EXCHANGE CENTERS IN HYDROGEN FORM WHICH ARE SUBSTANTIALLY LESS ACIDIC THAN SULFUR DIOXIDE AND EVOLVING A SUBSTANTIAL PORTION OF SAID VOLATILE ACID IN GASEOUS FORM AND ABSORBING SODIUM ON THE RESIN, AND WITH SULFUROUS ACID TO FORM A SOLUTION CONTAINING SODIUM BISULFITE.
Claim 2
Dependent Claim
83 words
A PROCESS FOR THE PREPARATION OF A SODIUM BISULFITE SOLUTION WHICH COMPRISES TREATING SOLUTION CONTAINING A SODIUM SALT OF A WEAKLY ACIDIC VOLATILE ACID OF THE GROUP CONSISTING OF HYDROGEN SULFIDE AND CARBONIC ACID WITH A CATION EXCHANGE RESIN HAVING ACTIVE EXCHANGE CENTERS IN HYDROGEN FORM WHICH ARE SUBSTANTIALLY LESS ACIDIC THAN SULFUR DIOXIDE AND EVOLVING A SUBSTANTIAL PORTION OF SAID VOLATILE ACID IN GASEOUS FORM AND ABSORBING SODIUM ON THE RESIN, AND WITH SULFUROUS ACID TO FORM A SOLUTION CONTAINING SODIUM BISULFITE.
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |