Patent US3524720A successfully refreshed from Google Patents.
US3524720A
Expired / Lapsed
US
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Process for removing sulfur dioxide from gases
Assignee: Lummus Technology LLC
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Filing: 1967-04-24
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Granted: 1970-08-18
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Expires: 1987-04-24
Abstract
No abstract record available.
Inventors
- 👤 William V Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:17
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0473; C01B17/0482; B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508; C01B32/00; C01B32/40; B01D2251/00; B01D2251/30; B01D2251/40; B01D2251/60; B01D2251/606; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/108; B01D2257/00; B01D2257/30; B01D2257/50; B01D2257/502; B01D2257/504; B01D2259/00; B01D2259/40; B01D2259/402; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 0
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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) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |