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US3055641A
Expired / Lapsed
US
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Heat exchanger
Assignee: RTX Corp
•
Filing: 1960-05-03
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Granted: 1962-09-25
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Expires: 1980-05-03
Abstract
No abstract record available.
Inventors
- 👤 John R Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:28
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/005; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/063; Y10S165/065; Y10S165/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US632506A
Cited
US2160898A
Cited
US2606006A
Cited
US2739795A
Cited
US2858113A
Cited
US2819330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |