US3157540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure process for improving the mechanical properties of metals
Assignee: Engelhard Industries Inc
•
Filing: 1960-05-31
•
Granted: 1964-11-17
•
Expires: 1980-05-31
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Bobrowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:04
CPC Classifications
C; C21; C21D; C21D10/00; B; B21; B21J; B21J5/00; B23; B23P; B23P15/00; B23P15/16; C22; C22F; C22F3/00; Y; Y10; Y10S; Y10S72/00; Y10S72/70; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PROCESS FOR IMPROVING THE MECHANICAL PROPERTIES OF METAL SPECMENS WITHOUT SUBSTANTIAL DIMENSIONAL CHANGE THEREOF WHICH COMPRISES THE STEPS OF ENCASING THE SPECIMEN IN A SOLID NON-ELASTOMERIC JACKET, SAID JACKET HAVING COMPRESSIBILITY GREATER THAN THAT OF THE ENCASED SPECIMEN, AND SUBJECTING THE ENCASED SPECIMENTO HIGH DYDROSTATIC PRESSURE BETWEEN 1,000 AND 50,000 ATMOSPHERES.
Claim 2
Dependent Claim
52 words
A PROCESS FOR IMPROVING THE MECHANICAL PROPERTIES OF METAL SPECMENS WITHOUT SUBSTANTIAL DIMENSIONAL CHANGE THEREOF WHICH COMPRISES THE STEPS OF ENCASING THE SPECIMEN IN A SOLID NON-ELASTOMERIC JACKET, SAID JACKET HAVING COMPRESSIBILITY GREATER THAN THAT OF THE ENCASED SPECIMEN, AND SUBJECTING THE ENCASED SPECIMENTO HIGH DYDROSTATIC PRESSURE BETWEEN 1,000 AND 50,000 ATMOSPHERES.
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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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |