Patent US3407875A successfully refreshed from Google Patents.
US3407875A
Expired / Lapsed
US
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Flow distributing means in heat exchangers
Assignee: United Aircraft Products Inc
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Filing: 1966-03-02
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Granted: 1968-10-29
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Expires: 1986-03-02
Abstract
No abstract record available.
Inventors
- 👤 Robert L Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:46
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/026; F28F9/0263; F28F13/00; F28F13/003; F28F9/22; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/483
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US673767A
Cited
US1124740A
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US1484749A
Cited
US1673409A
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US2178095A
Cited
US2602647A
Cited
US3196943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |