Patent CA660906A successfully refreshed from Google Patents.
Patent US2961357A successfully refreshed from Google Patents.
US2961357A
Expired / Lapsed
US
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Method for preparing bushings
Assignee: EIDP Inc
•
Filing: 1958-03-20
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Granted: 1960-11-22
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Expires: 1978-03-20
Abstract
No abstract record available.
Inventors
- 👤 Earnhardt Reid
- 👤 James P Swed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:55
CPC Classifications
C; C21; C21D; C21D7/00; C21D7/02; C21D7/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49647; Y10T29/49668; Y10T29/49707; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD FOR HARDENING THE INNER SURFACE OF AN AUSTENITIC MANGANESE STEEL HOLLOW BODY WHICH COMPRISES POSITIONING A LAYER OF A DETONATING EXPLOSIVE COMPOSITION ON THE OUTER SURFACE OF SAID BODY, INSERTING A MANDREL OF A DEFORMATION-RESISTANT MATERIAL INSIDE SAID BODY, INITIATING SAID EXPLOSIVE CHARGE AND THEREBY HARDENING THE INNER SURFACE OF SAID HOLLOW BODY TO A SUBSTANTIALLY GREATER DEGREE THAN THE OUTER SURFACE OF SAID BODY.
Claim 2
Independent Claim
67 words
A METHOD FOR HARDENING THE INNER SURFACE OF AN AUSTENITIC MANGANESE STEEL HOLLOW BODY WHICH COMPRISES POSITIONING A LAYER OF A DETONATING EXPLOSIVE COMPOSITION ON THE OUTER SURFACE OF SAID BODY, INSERTING A MANDREL OF A DEFORMATION-RESISTANT MATERIAL INSIDE SAID BODY, INITIATING SAID EXPLOSIVE CHARGE AND THEREBY HARDENING THE INNER SURFACE OF SAID HOLLOW BODY TO A SUBSTANTIALLY GREATER DEGREE THAN THE OUTER SURFACE OF SAID BODY.
References Cited (Backward Citations)
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US2779279A
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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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |