US3555739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for shaping, sizing and finishing the edge of a lens blank
Assignee: Individual
•
Filing: 1968-09-16
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Granted: 1971-01-19
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Expires: 1988-09-16
Abstract
Abstract A MACHINE HAVING A ROTATABLE LENS BLANK HOLDER AND A ROTATABLE TABLE TO ACCOMMODATE A SPECTACLE FRAME WITH MOTOR-DRIVEN MECHANISM FOR ROTATING THESE IN SYNCHRONISM AND A MOTOR-DRIVEN GRINDING WHEEL MOVABLE TOWARD AND AWAY FROM THE AXIS OF ROTATION OF THE HOLDER, A TRACING ASSEMBLY ADAPTED TO FOLLOW THE SPECTACLE FRAME LENS OPENING AND OPERATIVELY CONNECTED TO THE GRINDING WHEEL TO LIMIT MOVEMENT OF THE LATTER TOWARD THE HOLDER, AND MEANS FOR MOMENTARILY OPERATING THE MOTOR-DRIVEN MECHANISM FOR THE ROTARY TABLE AND HOLDER UPON MOVEMENT OF THE GRINDING WHEEL TOWARD THE HOLDER TO A PREDETERMINED SPACING THEREFROM.
Inventors
- 👤 Ezra H Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:48
CPC Classifications
B; B24; B24B; B24B9/00; B24B9/02; B24B9/06; B24B9/08; B24B9/14; B24B9/144; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/302968; Y10T409/303248
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |