US3803291A
Expired / Lapsed
US
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Sulfur dioxide removal via polymer formation
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1972-04-04
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Granted: 1974-04-09
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Expires: 1992-04-04
Abstract
Abstract SULFUR DIOXIDE IS SELECTIVELY REMOVED FROM A GAS MIXTURE SUCH AS FLUE GAS BY CONTACTING THE GAS MIXTURE WITH A DERIVATIVE OF NORBORNENE AT A TEMPERATURE OF ABOUT 0* TO 100*C. THE RESULTING POLYMER CAN BE THERMALLY DECOMPOSED AT TEMPERATURES ABOVE ABOUT 150*C., THEREBY MAKING REPEATED CYCLIC DESULFURIZATION AND REGENERATION POSSIBLE.
Inventors
- 👤 R Lundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:13
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/507; C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |