US2913819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powdered metal armature
Assignee: Emhart Industries Inc
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Filing: 1957-08-26
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Granted: 1959-11-24
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Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Eugene R Andreotti
- 👤 Mikitka John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:51
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; B22F7/062; H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10279; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A METHOD OF MAKING AN ARMATURE BLANK, THE STEPS OF: FORMING A FIRST MEMBER FROM POWDERED METAL AND SINTERING THE SAME TO FULLY SINTER THE POWDERED METAL CONSTITUTING SAID FIRST MEMBER; FORMING A SECOND MEMBER FROM POWDERED METAL AND LEAVING IT IN THE GREEN STATE, SAID SECOND MEMBER''S POWDERED METAL BEING PERMANENTLY EXPANSIBLE BY EXPOSURE TO SINTERING TEMPERATURES BETWEEN 2000*F. AND 2500*F.; INTERNESTLING SAID MEMBERS; SUBJECTING SAID INTERNESTED MEMBERS TO SINTERING TEMPERATURES TO EXPAND SAID GREEN MEMBER INTO A PHYSICAL BOND WITH SAID FIRST MEMBER TO SINTER SAID GREEN MEMBER; AND REMOVING A SUFFICIENT PORTION OF THE OUTER OF SAID MEMBERS TO EXPOSE PORTIONS OF THE INNER ONE THEREOF.
Claim 2
Dependent Claim
110 words
IN A METHOD OF MAKING AN ARMATURE BLANK, THE STEPS OF: FORMING A FIRST MEMBER FROM POWDERED METAL AND SINTERING THE SAME TO FULLY SINTER THE POWDERED METAL CONSTITUTING SAID FIRST MEMBER; FORMING A SECOND MEMBER FROM POWDERED METAL AND LEAVING IT IN THE GREEN STATE, SAID SECOND MEMBER''S POWDERED METAL BEING PERMANENTLY EXPANSIBLE BY EXPOSURE TO SINTERING TEMPERATURES BETWEEN 2000*F. AND 2500*F.; INTERNESTLING SAID MEMBERS; SUBJECTING SAID INTERNESTED MEMBERS TO SINTERING TEMPERATURES TO EXPAND SAID GREEN MEMBER INTO A PHYSICAL BOND WITH SAID FIRST MEMBER TO SINTER SAID GREEN MEMBER; AND REMOVING A SUFFICIENT PORTION OF THE OUTER OF SAID MEMBERS TO EXPOSE PORTIONS OF THE INNER ONE THEREOF.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |