Patent US5623929A successfully refreshed from Google Patents.
Patent US3606573A successfully refreshed from Google Patents.
US3606573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous laminate
Assignee: Motors Liquidation Co
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Filing: 1969-08-15
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Granted: 1971-09-20
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Expires: 1989-08-15
Abstract
Abstract A POROUS SHEET ADAPTED FOR TRANSPIRATION COOLING, AS IN TURBINE BLADES, IS MADE UP OF PLURAL LAYERS OF METAL BONDED TOGETHER WITH BOSSES PROJECTINJG FROM THE SURFACES OF THE LAYERS TO CREATE A SPACE OR PASSAGE BETWEEN LAYERS AND WITH PORE THROUGH THE LAYERS, THE PORES IN EACH LAYER BEING OUT OF REGISTER WITH THOSE IN THE ADJACENT LAYER OR LAYERS. THE PORES EXTEND THROUGH THE SIDES OF THE BOSSES THUS REDUCING THE MASS OF THE BOSSES AND FACILITATING CONTROL OF THE PERMEABILITY OF THE SHEET.
Inventors
- 👤 Calvin W Emmerson
- 👤 Jack E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:39
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/182; F01D5/184; F05; F05D; F05D2260/00; F05D2260/20; F05D2260/204
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |