US3065059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sulfur
Assignee: Shell USA Inc
•
Filing: 1961-07-28
•
Granted: 1962-11-20
•
Expires: 1981-07-28
Abstract
No abstract record available.
Inventors
- 👤 Redlich Otto
- 👤 Michael N Papadopoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:06
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS FOR THE PRODUCTION OF SULFUR COMPRISING: PASSING A GAS STREAM CONTAINING HYDROGEN SULFIDE TOGETHER WITH AN OXYGEN-CONTAINING GAS THROUGH AN AQUEOUS SOLUTION OF CO-MIXED FERROUS SULFATE AND FERROUS PERCHLORATE AND THEREAFTER SEPARATING THE SULFUR PRECIPITATE FROM SAID SOLUTION.
Claim 2
Dependent Claim
40 words
A PROCESS FOR THE PRODUCTION OF SULFUR COMPRISING: PASSING A GAS STREAM CONTAINING HYDROGEN SULFIDE TOGETHER WITH AN OXYGEN-CONTAINING GAS THROUGH AN AQUEOUS SOLUTION OF CO-MIXED FERROUS SULFATE AND FERROUS PERCHLORATE AND THEREAFTER SEPARATING THE SULFUR PRECIPITATE FROM SAID SOLUTION.
References Cited (Backward Citations)
US737579A
Cited
US1516915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |