US3564908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Micro hardness tester attachable to microscopes
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1968-05-27
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Granted: 1971-02-23
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Expires: 1988-05-27
Abstract
Abstract A SUPPORT MEMBER IS PROVIDED HAVING MEANS FOR ATTACHING SAID MEMBER TO A MICROSCOPE IN THE PLACE OF AN OBJECTIVE. A SOLID BODY IS PIVOTABLY SUPPORTED BY SAID MEMBER, INTO SAID BODY BEING MOUNTED THE OBJECTIVE AND AN INDENTOR WITH THEIR AXES EXTENDING AT AN ANGLE TO EACH OTHER. MEANS ARE PROVIDED FOR PIVOTING SAID BODY THROUGH SAID ANGLE SO AS TO ALIGN EITHER THE OBJECTIVE AXIS OR THE INDENTOR AXIS WITH THE OPTICAL AXIS OF THE MICORSCOPE, AND FURTHER MEANS ARE PROVIDED ADAPTED TO DISPLACE SAID INDENTOR ALONG ITS AXIS SO AS TO PRODUCE AN INDENTATION IN THE SURFACE OF A SPECIMEN TO BE TESTED.
Inventors
- 👤 Hugo Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:06
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/40; G01N3/42; G02; G02B; G02B21/00; G02B21/24
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |