Patent US3770647A successfully refreshed from Google Patents.
US3770647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped acceptors for binding and removing sulfur oxides from flue gases and process for their manufacture
Assignee: Shell USA Inc
•
Filing: 1970-07-27
•
Granted: 1973-11-06
•
Expires: 1990-07-27
Abstract
Abstract A PROCESS IS DISCLOSED FOR THE MANUFACTURE OF SHAPED ARTICLES WHICH ARE SUITABLE TO BE USED AS SOLID ACCEPTORS IN GAS CLEANING PROCESSES BY MIXING A DEHYDRATED REFRACTORY OXIDE WHICH A CERAMIC BINDER, FORMING THE MIXTURE INTO A SHAPED ARTICLE, HEATING THE SHAPED ARTICLE TO A TEMPERATURE TO FORM A CERAMIC ARTICLE, IMPREGNATING WITH A METAL COMPOUND, AND THEN CALCINING THE FORMED, IMPREGNATED ARTICE.
Inventors
- 👤 J Naber
- 👤 F Dautzenberg
- 👤 H Kouwenhoven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:33
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508; B01J; B01J15/00; B01J15/005; B01J37/00; B01J37/0009
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |