US3689227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing insoluble sulfur
Assignee: Union Oil Company of California
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Filing: 1971-11-12
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Granted: 1972-09-05
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Expires: 1991-11-12
Abstract
Abstract A PROCESS FOR PRODUCING INSOLUBLE SULFUR IS DISCLOSED AND INCLUDES THE STEPS OF MELTING AND HEATING SULFUR TO A TEMPERATURE OF FROM 400 TO 800* F. AND THEREAFTER QUICKLY QUENCHING THE MOLTEN SULFUR WITHIN AN AQUEOUS SOLUTION CONTAINING HYDROGEN PEROXIDE.
Inventors
- 👤 Michael J Block
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:30
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |