Patent US3389508A successfully refreshed from Google Patents.
US3389508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder grinder
Assignee: Coburn Manufacturing Co Inc
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Filing: 1964-07-01
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Granted: 1968-06-25
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Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Jack M Suddarth
- 👤 Dolph L Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:44
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A LENS SURFACING MACHINE OF THE TYPE HAVING AN ABRADING LAP RECEIVING IRREGULAR MOVEMENTS IN A COMMON PLANE AND A LENS BLANK SUPPORTING STRUCTURE FOR MAINTAINING THE BLANK IN ENGAGEMENT WITH THE LAP, THE IMPROVEMENT IN SAID STRUCTURE COMPRISING A FRAMEWORK FORMING A PART OF THE MACHINE, A SUPPORTING HEAD ASSEMBLY DISPOSED ABOVE SAID LAP AND HAVING AN UPPERMOST END SLIDABLY RECEIVED IN SAID FRAMEWORK, A CRADLE AT THE LOWER END OF SAID ASSEMBLY, MEANS TO LOWER SAID ASSEMBLY UNTIL SAID CRADLE ENGAGES SAID BLANK, PNEUMATIC MEANS FOR MAINTAINING A DESIRED PRESSURE ON SAID CRADLE, A RESILIENT UNIVERSAL JOINT INTERMEDIATE THE ENDS OF SAID ASSEMBLY BETWEEN SAID CRADLE AND THAT PORTION OF SAID FRAMEWORK SLIDABLY RECEIVING SAID SHAFT.
Claim 2
Dependent Claim
118 words
A LENS SURFACING MACHINE OF THE TYPE HAVING AN ABRADING LAP RECEIVING IRREGULAR MOVEMENTS IN A COMMON PLANE AND A LENS BLANK SUPPORTING STRUCTURE FOR MAINTAINING THE BLANK IN ENGAGEMENT WITH THE LAP, THE IMPROVEMENT IN SAID STRUCTURE COMPRISING A FRAMEWORK FORMING A PART OF THE MACHINE, A SUPPORTING HEAD ASSEMBLY DISPOSED ABOVE SAID LAP AND HAVING AN UPPERMOST END SLIDABLY RECEIVED IN SAID FRAMEWORK, A CRADLE AT THE LOWER END OF SAID ASSEMBLY, MEANS TO LOWER SAID ASSEMBLY UNTIL SAID CRADLE ENGAGES SAID BLANK, PNEUMATIC MEANS FOR MAINTAINING A DESIRED PRESSURE ON SAID CRADLE, A RESILIENT UNIVERSAL JOINT INTERMEDIATE THE ENDS OF SAID ASSEMBLY BETWEEN SAID CRADLE AND THAT PORTION OF SAID FRAMEWORK SLIDABLY RECEIVING SAID SHAFT.
References Cited (Backward Citations)
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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) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |