US2812165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Header units for plate type heat exchanger
Assignee: Alstom Power Inc
•
Filing: 1953-02-06
•
Granted: 1957-11-05
•
Expires: 1973-02-06
Abstract
No abstract record available.
Inventors
- 👤 William E Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:35
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28F3/046; F28D; F28D9/00; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/387
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1991555A
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US2143269A
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US2136641A
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US2429508A
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FR914783A
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FR927739A
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FR922129A
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US2526135A
Cited
US2697588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |