Patent US3804749A successfully refreshed from Google Patents.
US3804749A
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Process for desulfurization of chemical media or of materials containing sulfur and/or its derivatives
Assignee: Individual
•
Filing: 1972-08-21
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Granted: 1974-04-16
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Expires: 1992-08-21
Abstract
Abstract THE INVENTION CONCERNS A PROCESS FOR DESULFURIZATION OF CHEMICAL MEDIA OR OF MATERIALS CONTAINING SULFUR AND/OR ITS DERIVATIVES WHEREIN SAID MEDIA OR MATERIALS TO BE DESULFURIZED ARE CONTACTED WITH A COORDINATION COMPLEX OF BF3 IN SOLUTION IN A SOLVENT AND SAID MEDIA OR SAID MATERIALS ARE SEPARATED FROM SAID SOLUTION.
Inventors
- 👤 P Cholet
- 👤 J Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:05
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06; C10G29/12
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |