Patent US3677831A successfully refreshed from Google Patents.
US3677831A
Expired / Lapsed
US
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Stress relief in solid materials
Assignee: Lodding Engineering Corp
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Filing: 1970-05-14
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Granted: 1972-07-18
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Expires: 1990-05-14
Abstract
Abstract A METHOD AND APPARATUS ARE DISCLOSED FOR RELIEVING STRESS IN SOLID MATERIALS. VIBRATIONS ARE APPLIED TO A WORKPIECE, WHICH ARE VARIED THROUGH A GIVEN FREQUENCY RANGE IN A SPECIFIC TIME INTERVAL ACCORDING TO A REPRODUCIBLE PATTERN, AND SIGNALS WHICH SAMPLE A REACTION OF THE WORKPIECE TO THE VIBRATIONS ARE RECORDED ALONG THE PATH OR PATHS OF A POINT OR POINTS BEING DISPLACED WITH RESPECT TO TIME IN SYNCHRONISM WITH THE REPRODUCIBLE PATTERN.
Inventors
- 👤 Constantine Demetrius Pezaris
- 👤 Theophanes G Pantazelos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:53
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/10; C; C21; C21D; C21D10/00
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |