US2631018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentrating apparatus
Assignee: Niagara Blower Co
•
Filing: 1948-04-03
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Granted: 1953-03-10
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Expires: 1968-04-03
Abstract
No abstract record available.
Inventors
- 👤 Kals Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:41
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/143; B01D3/148; F; F24; F24F; F24F5/00; F24F5/0007; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2577; Y10T137/7287; Y10T137/7358; Y10T137/7368
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1721760A
Cited
US1841812A
Cited
US2199967A
Cited
US2235004A
Cited
US2286618A
Cited
US2324193A
Cited
US2352655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |