Patent US2563437A successfully refreshed from Google Patents.
US2563437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of
Assignee: —
•
Filing: —
•
Granted: 1951-08-07
•
Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:39
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR THE PRODUCTION OF ELEMENTAL SULFUR WHICH COMPRISES CONTACTING SULFUR DIOXIDE WITH A DILUTE AQUEOUS SOLUTION OF ALUMINUM SULFATE AND SULFURIC ACID, WHEREBY AN AQUEOUS SOLUTION OF ALUMINUM SULFATE, SULFURIC ACID AND SULFUROUS ACID IS FORMED, AND PASSING HYDROGEN SULFIDE THROUGH SAID SOLUTION WHEREBY ELEMENTAL SULFUR IS PRODUCED.
Claim 2
Dependent Claim
50 words
A PROCESS FOR THE PRODUCTION OF ELEMENTAL SULFUR WHICH COMPRISES CONTACTING SULFUR DIOXIDE WITH A DILUTE AQUEOUS SOLUTION OF ALUMINUM SULFATE AND SULFURIC ACID, WHEREBY AN AQUEOUS SOLUTION OF ALUMINUM SULFATE, SULFURIC ACID AND SULFUROUS ACID IS FORMED, AND PASSING HYDROGEN SULFIDE THROUGH SAID SOLUTION WHEREBY ELEMENTAL SULFUR IS PRODUCED.
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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |