US2885316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for degassing aluminum articles by means of a vaporous fluoride
Assignee: Alcoa Corp
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Filing: 1958-07-21
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Granted: 1959-05-05
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Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 Spencer R Milliken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:28
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD FOR THE PRODUCTION OF SUBSTANTIALLY GASFREE AND VOID-FREE WROUGHT ALUMINUM ARTICLES COMPRISING: EXPOSING AN ALUMINUM ARTICLES CONTAINING GAS AND VOIDS TO A VAPOROUS FLUORIDE TO DEVELOP A FILM THEREON THAT SUBSTANTIALLY PREVENTS THE ACCUMULATION OF MONATOMIC HYDROGEN AT THE SURFACE THEREOF; HEATING SAID ARTICLES AT A TEMPERATURE ABOVE 750* F. FOR A LENGTH OF TIME SUFFICIENT TO DIFFUSE OCCLUDED GAS INTO THE ATMOSPHERE AROUND SAID ARTICLE; AND THEREAFTER WORKING THE METAL OF SAID ARTICLE SUFFICIENTLY TO HEAL VOIDS IN SAID ARTICLE.
Claim 2
Independent Claim
83 words
A METHOD FOR THE PRODUCTION OF SUBSTANTIALLY GASFREE AND VOID-FREE WROUGHT ALUMINUM ARTICLES COMPRISING: EXPOSING AN ALUMINUM ARTICLES CONTAINING GAS AND VOIDS TO A VAPOROUS FLUORIDE TO DEVELOP A FILM THEREON THAT SUBSTANTIALLY PREVENTS THE ACCUMULATION OF MONATOMIC HYDROGEN AT THE SURFACE THEREOF; HEATING SAID ARTICLES AT A TEMPERATURE ABOVE 750* F. FOR A LENGTH OF TIME SUFFICIENT TO DIFFUSE OCCLUDED GAS INTO THE ATMOSPHERE AROUND SAID ARTICLE; AND THEREAFTER WORKING THE METAL OF SAID ARTICLE SUFFICIENTLY TO HEAL VOIDS IN SAID ARTICLE.
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |