US2676872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and technique of working with sulfur dioxide
Assignee: Compagnie de Saint Gobain SA
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Filing: 1951-01-02
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Granted: 1954-04-27
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Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Viard Marcel Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:11
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/56
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
THE METHOD OF CARRYING OUT SO2 REACTIONS THAT COMPRISES BRINGING A MATERIAL, CAPABLE OF BEING REACTED WITH SO2, INTO CONTACT WITH A LIQUID CONSISTING IN ITS ESSENTIAL INGREDIENTS OF GLYCOL SULFITE CHARGED WITH A SUBSTANTIAL QUANTITY OF SULFUR DIOXIDE, AT A TEMPERATURE BELOW ABOUT 20* C.
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) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |