Patent US2967699A successfully refreshed from Google Patents.
US2967699A
Expired / Lapsed
US
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Liquid-gas contact apparatus
Assignee: AO Smith Corp
•
Filing: 1958-11-07
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Granted: 1961-01-10
•
Expires: 1978-11-07
Abstract
No abstract record available.
Inventors
- 👤 Carl S Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:58
CPC Classifications
B; B01; B01D; B01D47/00; B01D3/00; B01D3/14; B01D3/16; B01D3/18; B01D3/20; Y; Y10; Y10S; Y10S220/00; Y10S220/901; Y10S220/917
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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |