US2729433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger with removable tube banks
Assignee: AO Smith Corp
•
Filing: 1952-01-07
•
Granted: 1956-01-03
•
Expires: 1972-01-07
Abstract
No abstract record available.
Inventors
- 👤 William F Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:15
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0233; F28D1/024; F28D9/00; F28D9/0012; F28F; F28F27/00; F28F27/02; F28F9/00; F28F9/22; F28F2280/00; F28F2280/02; Y; Y10; Y10S; Y10S165/00; Y10S165/092; Y10S165/109; Y10S165/11; Y10S165/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1737189A
Cited
US1784956A
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US2038002A
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US2336840A
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US2423175A
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US2421371A
Cited
US2521866A
Cited
US2615687A
Cited
US2650073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |