US3424240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated stacked-plate heat exchanger
Assignee: Avco Corp
•
Filing: 1966-08-26
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Granted: 1969-01-28
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Expires: 1986-08-26
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang J Stein
- 👤 Salvatore Straniti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:28
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/08; F28; F28D; F28D9/00; F28D9/0012; F05; F05D; F05D2250/00; F05D2250/60; F05D2250/61; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/357
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |