Patent US2568779A successfully refreshed from Google Patents.
Patent US2869227A successfully refreshed from Google Patents.
US2869227A
Expired / Lapsed
US
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Process of coating and hot working of metals
Assignee: IIT Research Institute
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Filing: 1955-07-01
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Granted: 1959-01-20
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Expires: 1975-07-01
Abstract
No abstract record available.
Inventors
- 👤 Samuel W Bradstreet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:35
CPC Classifications
B; B21; B21J; B21J1/00; B21J1/06; B21J3/00; C; C23; C23C; C23C4/00; C23C4/04; C23C4/10; C23C4/11; C23C4/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS WHICH COMPRISES DIRECTING A HIGH TEMPERATURE FLAME AT THE WORKING FACE OF A METAL WORKING DIE AND INJECTING INTO SAID FLAME PARTICULATED ALUMINA TO COAT SAID FACE, HEATING A WORKPIECE TO METAL WORKING TEMPERATURES, AND APPLYING THE WORKING FACE OF THE DIE TO SAID PIECE TO FORM THE SAME.
Claim 2
Dependent Claim
51 words
A PROCESS WHICH COMPRISES DIRECTING A HIGH TEMPERATURE FLAME AT THE WORKING FACE OF A METAL WORKING DIE AND INJECTING INTO SAID FLAME PARTICULATED ALUMINA TO COAT SAID FACE, HEATING A WORKPIECE TO METAL WORKING TEMPERATURES, AND APPLYING THE WORKING FACE OF THE DIE TO SAID PIECE TO FORM THE SAME.
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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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |