US3522491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer apparatus for cooling semiconductor components
Assignee: Wakefield Engineering Inc
•
Filing: 1967-05-31
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Granted: 1970-08-04
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Expires: 1987-05-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Coe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:35
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/641
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2817048A
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US2857560A
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US2887628A
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US2917286A
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US3213336A
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US3249680A
Cited
US3297916A
Cited
US3355540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |