US3364987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier assembly comprising semi-conductor rectifiers with two separate heat sinks
Assignee: ABB Norden Holding AB
•
Filing: 1965-09-23
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Granted: 1968-01-23
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Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 Bylund Per-Ake
- 👤 Mellgren Gunnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:51
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/40; H10W40/43; Y; Y10; Y10S; Y10S257/00; Y10S257/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN A RECTIFIER ASSEMBLY COMPRISING SEMI-CONDUCTOR RECTIFIERS WITH TWO SEPARATE HEAT SINKS, A COOLING AIR DUCT HAVING TWO WALLS LATERALLY CLOSING SAID SINKS, SAID ASSEMBLY INCLUDING MEANS PERMITTING INSERTION OF SAID RECTIFIERS INTO THE DUCT FROM THE SIDE OF THE DUCT, AND SEALING MEANS TO PREVENT COOLING AIR FROM FLOWING IN THE SPACE BETWEEN
Claim 2
Dependent Claim
54 words
IN A RECTIFIER ASSEMBLY COMPRISING SEMI-CONDUCTOR RECTIFIERS WITH TWO SEPARATE HEAT SINKS, A COOLING AIR DUCT HAVING TWO WALLS LATERALLY CLOSING SAID SINKS, SAID ASSEMBLY INCLUDING MEANS PERMITTING INSERTION OF SAID RECTIFIERS INTO THE DUCT FROM THE SIDE OF THE DUCT, AND SEALING MEANS TO PREVENT COOLING AIR FROM FLOWING IN THE SPACE BETWEEN
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) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |