US3084080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of void-free aluminum and aluminum base alloy articles
Assignee: Alcoa Corp
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Filing: 1958-07-17
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Granted: 1963-04-02
•
Expires: 1978-07-17
Abstract
No abstract record available.
Inventors
- 👤 Hunter Matthew Scott
- 👤 Edmund C Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:36
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
THE METHOD FOR THE PRODUCTION OF SUBSTANTIALLY GASFREE AND VOID-FREE ALUMINUM ARTICLES COMPRISING: HEATING AN ARTICLE HAVING A NATURAL SURFACE CONDITION AND CONTAINING GAS AND VOIDS TO A TEMPERATURE ABOVE 750*F. BUT BELOW THE TEMPERATURE OF INCIPIENT FUSION OF THE METAL IN AN ATMOSPHERE CONTAINING LESS THAN 2.0 GRAINS OF MOISTURE PER CUBIC FOOT AND COMPOSED OF AT LEAST ONE GASEOUS SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF AIR AND GASES INERT TOWARD ALUMINUM, AND, IN ADDITION, ANY GAS DERIVED FROM THE ARTICLE BEING TREATED, SAID ATMOSPHERE BEING AT A PRESSURE NOT LESS THAN ATMOSPHERIC PRESSURE, SAID ATMOSPHERE SURROUNDING AND IN CONTACT WITH A SUBSTANTIAL PORTION OF THE SURFACE OF SAID ARTICLE, SAID HEATING BEING CONTINUED FOR A LENGTH OF TIME SUFFICIENT TO DIFFUSE A MAJOR PORTION OF THE OCCLUDED GAS TO THE SURFACE OF SAID ARTICLE AND THENCE INTO THE SURROUNDING ATMOSPHERE, REMOVING SAID ARTICLE FROM THE TREATING ATMOSPHERE AND IMMEDIATELY THEREAFTER HOT WORKING THE ARTICLE SUFFICIENTLY TO HEAL ANY DEGASSED VOIDS.
Claim 2
Independent Claim
163 words
THE METHOD FOR THE PRODUCTION OF SUBSTANTIALLY GASFREE AND VOID-FREE ALUMINUM ARTICLES COMPRISING: HEATING AN ARTICLE HAVING A NATURAL SURFACE CONDITION AND CONTAINING GAS AND VOIDS TO A TEMPERATURE ABOVE 750*F. BUT BELOW THE TEMPERATURE OF INCIPIENT FUSION OF THE METAL IN AN ATMOSPHERE CONTAINING LESS THAN 2.0 GRAINS OF MOISTURE PER CUBIC FOOT AND COMPOSED OF AT LEAST ONE GASEOUS SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF AIR AND GASES INERT TOWARD ALUMINUM, AND, IN ADDITION, ANY GAS DERIVED FROM THE ARTICLE BEING TREATED, SAID ATMOSPHERE BEING AT A PRESSURE NOT LESS THAN ATMOSPHERIC PRESSURE, SAID ATMOSPHERE SURROUNDING AND IN CONTACT WITH A SUBSTANTIAL PORTION OF THE SURFACE OF SAID ARTICLE, SAID HEATING BEING CONTINUED FOR A LENGTH OF TIME SUFFICIENT TO DIFFUSE A MAJOR PORTION OF THE OCCLUDED GAS TO THE SURFACE OF SAID ARTICLE AND THENCE INTO THE SURROUNDING ATMOSPHERE, REMOVING SAID ARTICLE FROM THE TREATING ATMOSPHERE AND IMMEDIATELY THEREAFTER HOT WORKING THE ARTICLE SUFFICIENTLY TO HEAL ANY DEGASSED VOIDS.
References Cited (Backward Citations)
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US2995478A
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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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |