US3562371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature gas isostatic pressing of crystalline bodies having impermeable surfaces
Assignee: Corning Glass Works
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Filing: 1968-10-16
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Granted: 1971-02-09
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Expires: 1988-10-16
Abstract
Abstract CRYSTALLINE METAL AND CERAMIC BODIES THAT HAVE PREVIOUSLY BEEN SINTERED TO THE EXTENT THAT THE ONLY POROSITY REMAINING IN THE BODY IS CLOSED POROSITY ARE ISOSTATICALLY HOT PRESSED TO A STILL HIGHER DENSITY BY SURROUNDING THE BODY WHICH IS MAINTAINED AT SINTERING TEMPERATUR WITH A GAS AT A PRESSURE OF AT LEAST 10,000 P.S.I. THE GAS MUST BE INERT TO THE BODY BEING PRESSD AND MUST NOT PERMEATE SAID BODY DURING THE HOT ISOSTATIC PRESSING STEP. WHILE PRIOR ISOSTATIC HOT PRESSING PROCESSED HAVING REQUIRED THE USE OF AN IMPERMEABLE CONTAINER OR AN ADDITIONAL COATING LAYER FOR THE WORK PIECE NEITHER ARE REQUIRED IN THE PRESENT PROCESS.
Inventors
- 👤 Edward A Bush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/32; C04B33/326; B; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |