US2836398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative heat exchanger for gas turbines
Assignee: Individual
•
Filing: 1953-09-10
•
Granted: 1958-05-27
•
Expires: 1973-09-10
Abstract
No abstract record available.
Inventors
- 👤 Linderoth Erik Torvald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
F; F28; F28D; F28D17/00; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/01; Y10S165/012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1808921A
Cited
US1916337A
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US2236635A
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US2459446A
Cited
GB651771A
Cited
CH286032A
Cited
US2549656A
Cited
US2602645A
Cited
US2665118A
Cited
US2673718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |