Patent US3000755A successfully refreshed from Google Patents.
US3000755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation-resistant turbine blades
Assignee: Motors Liquidation Co
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Filing: 1956-10-11
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Granted: 1961-09-19
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Expires: 1976-10-11
Abstract
No abstract record available.
Inventors
- 👤 Dean K Hanink
- 👤 Erwin R Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:09
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/12; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD OF MAKING A HIGH TEMPERATURE OXIDATIONRESISTANT TURBINE BLADE WHICH COMPRISES APPLYING A COATING METAL SELECTED FROM THE CLASS CONSISTING OF ALUMINUM AND ALUMINUM BASE ALLOYS TO SURFACES OF A TURBINE BLADE FORMED OF A BASE METAL SELECTED FROM THE CLASS CONSISTING OF NICKEL BASE ALLOYS AND COBALT BASE ALLOYS, HEATING SAID BLADE TO DIFFUSE A PORTION OF SAID COATING METAL INTO SAID BASE METAL, REMOVING EXCESS COATING METAL FROM SAID SURFACES WITH AN ACID SOLUTION, AND THEREAFTER HEATING SAID BLADE FOR A PERIOD OF TIME SUFFICIENT TO DIFFUSE THE REMAINING COATING METAL INTO SAID SURFACES TO FORM WITH THE BASE METAL OF SAID TURBINE BLADE AN OXIDATION-RESISTANT SURFACE LAYER OF AN ALLOY OF SAID COATING METAL AND SAID BASE METAL HAVING A THICKNESS NOT IN EXCESS OF APPROXIMATELY 0.0025 INCH.
Claim 2
Independent Claim
132 words
A METHOD OF MAKING A HIGH TEMPERATURE OXIDATIONRESISTANT TURBINE BLADE WHICH COMPRISES APPLYING A COATING METAL SELECTED FROM THE CLASS CONSISTING OF ALUMINUM AND ALUMINUM BASE ALLOYS TO SURFACES OF A TURBINE BLADE FORMED OF A BASE METAL SELECTED FROM THE CLASS CONSISTING OF NICKEL BASE ALLOYS AND COBALT BASE ALLOYS, HEATING SAID BLADE TO DIFFUSE A PORTION OF SAID COATING METAL INTO SAID BASE METAL, REMOVING EXCESS COATING METAL FROM SAID SURFACES WITH AN ACID SOLUTION, AND THEREAFTER HEATING SAID BLADE FOR A PERIOD OF TIME SUFFICIENT TO DIFFUSE THE REMAINING COATING METAL INTO SAID SURFACES TO FORM WITH THE BASE METAL OF SAID TURBINE BLADE AN OXIDATION-RESISTANT SURFACE LAYER OF AN ALLOY OF SAID COATING METAL AND SAID BASE METAL HAVING A THICKNESS NOT IN EXCESS OF APPROXIMATELY 0.0025 INCH.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |