US2669974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating gaseous and fluidized powder streams
Assignee: Individual
•
Filing: 1947-12-23
•
Granted: 1954-02-23
•
Expires: 1967-12-23
Abstract
No abstract record available.
Inventors
- 👤 Johnsen Carsten Ingeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:28
CPC Classifications
C; C10; C10J; C10J3/00; B; B01; B01D; B01D45/00; B01D45/02; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/44; C10J3/72; C10J3/721; C10J3/74; C10J2300/00; C10J2300/09; C10J2300/0903; C10J2300/0906; C10J2300/0913; C10J2300/093; C10J2300/0953; C10J2300/0956; C10J2300/0973; C10J2300/0976; C10J2300/12; C10J2300/1253; C10J2300/16; C10J2300/1603; C10J2300/1606; C10J2300/1671; C10J2300/18; C10J2300/1807; C10J2300/1823; C10J2300/1861; C10J2300/1869; C10J2300/1884
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |