US2239509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous enamel tank connection and method of construction
Assignee: AO Smith Corp
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Filing: 1938-06-24
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Granted: 1941-04-22
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Expires: 1958-06-24
Abstract
No abstract record available.
Inventors
- 👤 Otto E Uecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:26
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/08; F16L41/086; F24; F24H; F24H1/00; F24H1/18; F24H1/181; F24H1/183; F24H9/00; F24H9/12; F24H9/13; F24H9/133; Y; Y10; Y10S; Y10S220/00; Y10S220/917; Y10T; Y10T29/00; Y10T29/49; Y10T29/49394; Y10T29/49826; Y10T29/49888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-04-21 | 1944-10-21 | 1945-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-21 | 1948-10-21 | 1949-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-21 | 1952-10-21 | 1953-04-22 | $7700.00 | Window Closed / Lapsed |