Patent US3351283A successfully refreshed from Google Patents.
US3133383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball grinding and lapping machine
Assignee: North American Aviation Corp
•
Filing: 1961-06-12
•
Granted: 1964-05-19
•
Expires: 1981-06-12
Abstract
No abstract record available.
Inventors
- 👤 Richard M Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:13
CPC Classifications
B; B24; B24B; B24B11/00; B24B11/02; B24B11/04; B24B11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
MEANS FOR GRINDING A SPHERICAL SURFACE COMPRISING: AT LEAST THREE GRINDING CUP MEMBERS EACH SHAPED TO HAVE SUBSTANTIALLY THE SAME CURVATURE AND POSITIONED TO ENGAGE A SPHERICAL SURFACE IN A PLURALITY OF ZONAL REGIONS; MECHANICAL MEANS FOR ROTABLY OSCILLATING AT LEAST ONE SAID CUP MEMBER ABOUT A POLAR AXIS OF TIS SAID ZONAL REGION, MECHANICAL MEANS FOR ROTATING THE REMAINING SAID CUP MEMBERS; AND MECHANICAL FORCE MEANS CONNECTED TO ONE OF SAID CUP MEMBERS FOR URGING SAID ONE OF SAID CUP MEMBERS AGAINST SAID SPHERICAL SURFACE AND URGING SAID SPHERICAL SURFACE AGAINST THE OTHER OF SAID CUP MEMBERS.
Claim 2
Dependent Claim
98 words
MEANS FOR GRINDING A SPHERICAL SURFACE COMPRISING: AT LEAST THREE GRINDING CUP MEMBERS EACH SHAPED TO HAVE SUBSTANTIALLY THE SAME CURVATURE AND POSITIONED TO ENGAGE A SPHERICAL SURFACE IN A PLURALITY OF ZONAL REGIONS; MECHANICAL MEANS FOR ROTABLY OSCILLATING AT LEAST ONE SAID CUP MEMBER ABOUT A POLAR AXIS OF TIS SAID ZONAL REGION, MECHANICAL MEANS FOR ROTATING THE REMAINING SAID CUP MEMBERS; AND MECHANICAL FORCE MEANS CONNECTED TO ONE OF SAID CUP MEMBERS FOR URGING SAID ONE OF SAID CUP MEMBERS AGAINST SAID SPHERICAL SURFACE AND URGING SAID SPHERICAL SURFACE AGAINST THE OTHER OF SAID CUP MEMBERS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |