US2725288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for fabricating metallic articles
Assignee: Individual
•
Filing: 1952-08-26
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Granted: 1955-11-29
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Expires: 1972-08-26
Abstract
No abstract record available.
Inventors
- 👤 Harry W Dodds
- 👤 Charles B Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:02
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
THE METHOD OF SIMULTANEOUSLY COMPRESSING AND SINTERING A POWDERED REFRACTORY METAL WITHIN A OF CONFINING THE POWDERED REFRACTORY METAL WITHIN A FLEXIBLE METAL ENVELOPE MADE FROM A METAL SELECTED FROM THE GROUP CONSISTING OF STEEL, NICKEL, MOLYBDENUM, AND PLATINUM, PACKING A COMMINUTED REFRACTORY CARBIDE OR OXIDE ABOUT THE ENVELOPE TO RESTRAIN THE LATTER AGAINST DISTORTION, HEATING THE POWDERED REFRACTORY METAL TO SINTERING TEMPERATURE WHILE MAINTAINING A VACUUM WITHIN THE ENVELOPE, AND APPLYING FLUID PRESSURE TO THE EXTERIOR OF THE ENVELOPE BY THE USE OF AN INERT GAS SELECTED FROM THE GROUP CONSISTING OF ARGON, HELIUM, NITROGEN, AND HYDROGEN WHILE THE COMMINUTED REFRACTORY CARBIDE OR OXIDE IS PACKED THEREABOUT AND WHILE THE POWDERED METAL IS AT SINTERING TEMPERATURE.
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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |