US2599139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating solids from currents of gases
Assignee: NAT SMOKE CONTROL CORP
•
Filing: 1949-10-05
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Granted: 1952-06-03
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Expires: 1969-10-05
Abstract
No abstract record available.
Inventors
- 👤 Thomas K Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:35
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D45/10; F; F23; F23J; F23J11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |