US2949392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of relieving residual stresses in light metal articles
Assignee: Alcoa Corp
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Filing: 1958-12-18
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Granted: 1960-08-16
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Expires: 1978-12-18
Abstract
No abstract record available.
Inventors
- 👤 Lowell A Willey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF RELIEVING RESIDUAL STRESSES IN A LIGHT METAL ARTICLE COMPRISING CHILLING SAID ARTICLE TO A TEMPERATURE BELOW -100*F. REMOVING THE ARTICLE FROM THE CHILLING MEDIUM AND IMMEDIATELY AFTER REMOVAL THEREFROM DIRECTING A CURRENT OF CONDENSABLE VAPOR HAVING A TEMPERATURE NOT LOWER THAN THE BOILING POINT OF WATER OVER SUBSTANTIALLY THE ENTIRE EXTERNAL SURFACE OF THE ARTICLE AND AT A VELOCITY WHICH SWEEPS AWAY DROPLETS OF LIQUID CONDESATE WHEREBY THE SURFACE OF SAID ARTICLE IS HEATED AT A SUFFICIENTLY RAPID RATE AS TO PRODUCE PLASTIC FLOW IN THE METAL.
Claim 2
Independent Claim
90 words
THE METHOD OF RELIEVING RESIDUAL STRESSES IN A LIGHT METAL ARTICLE COMPRISING CHILLING SAID ARTICLE TO A TEMPERATURE BELOW -100*F. REMOVING THE ARTICLE FROM THE CHILLING MEDIUM AND IMMEDIATELY AFTER REMOVAL THEREFROM DIRECTING A CURRENT OF CONDENSABLE VAPOR HAVING A TEMPERATURE NOT LOWER THAN THE BOILING POINT OF WATER OVER SUBSTANTIALLY THE ENTIRE EXTERNAL SURFACE OF THE ARTICLE AND AT A VELOCITY WHICH SWEEPS AWAY DROPLETS OF LIQUID CONDESATE WHEREBY THE SURFACE OF SAID ARTICLE IS HEATED AT A SUFFICIENTLY RAPID RATE AS TO PRODUCE PLASTIC FLOW IN THE METAL.
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) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |