US3213491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardcoated mold press die
Assignee: RTX Corp
•
Filing: 1961-12-18
•
Granted: 1965-10-26
•
Expires: 1981-12-18
Abstract
No abstract record available.
Inventors
- 👤 Richard A Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:15
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/02; Y; Y10; Y10S; Y10S100/00; Y10S100/903; Y10S100/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN THE PRODUCTION OF BODIES OF VERY HIGH DENSITY AND VERY PRECISE DIAMETER, APPARATUS FOR ELECTRICAL RESISTANCE SINTERING OF METALLIC AND/OR CERAMIC POWDERS UNDER THE PRESSURE OF RELATIVELY AXIALLY MOVABLE ELECTRODE PLUNGERS COMPRISING, A DIE BODY WHEREIN THE BASE METAL IS ALUMINUM HAVING A PASSAGEWAY THEREIN ALIGNED WITH SAID ELECTRODE PLUNGERS AND INTO WHICH SAID PLUNGERS EXTEND IN CLOSE-FITTING RELATION THERETO, A HARD NON-DEFORMABLE ELECTROLYTICALLY-FORMED OXIDIZED LAYER ON THE SURFACE OF SAID PASSAGEWAY, SAID LAYER BEING SUBSTANTIALLY INTEGRAL WITH THE BASE METAL OF THE DIE BODY AND FORMING AN ELECTRICALLY INSULATING COATING THEREON, THE DIAMETER OF SAID PASSAGEWAY AS COATED COINCIDING WITH THE DIAMETER OF THE FINISHED BODY.
Claim 2
Dependent Claim
108 words
IN THE PRODUCTION OF BODIES OF VERY HIGH DENSITY AND VERY PRECISE DIAMETER, APPARATUS FOR ELECTRICAL RESISTANCE SINTERING OF METALLIC AND/OR CERAMIC POWDERS UNDER THE PRESSURE OF RELATIVELY AXIALLY MOVABLE ELECTRODE PLUNGERS COMPRISING, A DIE BODY WHEREIN THE BASE METAL IS ALUMINUM HAVING A PASSAGEWAY THEREIN ALIGNED WITH SAID ELECTRODE PLUNGERS AND INTO WHICH SAID PLUNGERS EXTEND IN CLOSE-FITTING RELATION THERETO, A HARD NON-DEFORMABLE ELECTROLYTICALLY-FORMED OXIDIZED LAYER ON THE SURFACE OF SAID PASSAGEWAY, SAID LAYER BEING SUBSTANTIALLY INTEGRAL WITH THE BASE METAL OF THE DIE BODY AND FORMING AN ELECTRICALLY INSULATING COATING THEREON, THE DIAMETER OF SAID PASSAGEWAY AS COATED COINCIDING WITH THE DIAMETER OF THE FINISHED BODY.
References Cited (Backward Citations)
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US2941243A
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |