US3433299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger of porous metal
Assignee: General Electric Co
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Filing: 1967-02-16
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Granted: 1969-03-18
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 Robert B Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:50
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/42; F28F13/00; F28F13/003; F28F2255/00; F28F2255/18
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) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |