US2631829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air and liquid contact apparatus
Assignee: Individual
•
Filing: 1947-12-24
•
Granted: 1953-03-17
•
Expires: 1967-12-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Carraway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:03
CPC Classifications
F; F24; F24F; F24F8/00; F24F8/10; F24F8/117; F24F8/133; Y; Y10; Y10S; Y10S261/00; Y10S261/34; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7313; Y10T137/7323; Y10T137/7326; Y10T137/7358; Y10T137/7368
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US515210A
Cited
US2087436A
Cited
US2162809A
Cited
US2221786A
Cited
US2235116A
Cited
US2437936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |