US3158968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding apparatus and method
Assignee: AT&T Inc
•
Filing: 1962-08-23
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Granted: 1964-12-01
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Expires: 1982-08-23
Abstract
No abstract record available.
Inventors
- 👤 Peder M Ness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:31
CPC Classifications
B; B24; B24B; B24B11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
APPARATUS FOR GRINDING AND POLISHING ON AN END OF AN ELONGATED MEMBER OF SMALL CROSS-SECTION A CONVEX SPHERICAL SURFACE HAVING A CENTER OF CURVATURE LYING NEAR THE AXIS OF THE MEMBER COMPRISING A WORK HOLDER HAVING AN END SURFACE OF GREATER AREA THAN THE CROSS-SECTIONAL AREA OF THE MEMBER TO BE SHAPED AND HAVING A HARDNESS SUBSTANTIALLY EQUAL TO THAT OF SAID MEMBER, SAID END SURFACE HAVING A CONVEX SPHERICAL SHAPE OF THE DESIRED RADIUS OF CURVATURE AND SAID WORK HOLDER HAVING MEANS FOR RECEIVING THE MEMBER TO BE SHAPED WITH ITS AXIS EXTENDING SUBSTANTIALLY ALONG A RADIUS OF SAID SURFACE, AND MEANS FOR GRINDING SAID MEMBER WITH SPHERICAL LAPS OF THE DESIRED RADIUS OF CURVATURE IN CONTACT WITH THE END SURFACE OF SAID WORK HOLDER.
Claim 2
Dependent Claim
130 words
APPARATUS FOR GRINDING AND POLISHING ON AN END OF AN ELONGATED MEMBER OF SMALL CROSS-SECTION A CONVEX SPHERICAL SURFACE HAVING A CENTER OF CURVATURE LYING NEAR THE AXIS OF THE MEMBER COMPRISING A WORK HOLDER HAVING AN END SURFACE GREATER AREA THAN THE CROSS-SECTIONAL AREA OF THE MEMBER TO BE SHAPED AND HAVING A HARDNESS SUBSTANTIALLY EQUAL TO THAT OF SAID MEMBER, SAID END SURFACE HAVING A CONVEX SPHERICAL SHAPE OF THE DESIRED RADIUS OF CURVATURE AND SAID WORK HOLDER HAVING MEANS FOR RECEIVING SERIATUM A GUIDE PIN AND THE MEMBER TO BE SHAPED WITH ITS AXIS EXTENDING SUBSTANTIALLY ALONG A RADIUS OF SAID SURFACE, AND MEANS FOR GRINDING SAID MEMBER WITH SPHERICAL LAPS OF THE DESIRED RADIUS OF CURVATURE IN CONTACT WITH THE END SURFACE OF SAID WORK HOLDER.
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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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |