US2790628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabricated fin tube heat exchanger
Assignee: Utica Drop Forge and Tool Corp
•
Filing: 1953-04-29
•
Granted: 1957-04-30
•
Expires: 1973-04-29
Abstract
No abstract record available.
Inventors
- 👤 William A Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:02
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; Y; Y10; Y10S; Y10S165/00; Y10S165/51; Y10S165/518; Y10S165/524; Y10S165/525; Y10S165/526; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49382
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US649204A
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US1788516A
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US1758638A
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US2251074A
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US2270810A
Cited
US2400737A
Cited
US2608887A
Cited
US2522408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |