US3624976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens block and adaptor therefor
Assignee: SHURON Inc 40 HUMBOLDT STREET ROCHESTER NEW YORK 14601 A CORP OF NEW YORK
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Filing: 1969-03-21
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Granted: 1971-12-07
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Expires: 1989-03-21
Abstract
Abstract A LENS BLOCK PROVIDED WITH REFERENCE SURFACES WHICH LOCATE THE LENS HORIZONTAL LAYOUT LINE AND PERMIT THE BLOCKED LENS TO BE PROPERLY CHUCKED, EITHER DIRECTLY OR BY AN ADAPTOR POSITIONED ON THE BLOCK, IN A LENS EDGE GRINDING MACHINE FOR ROUGH EDGING THE LENS BEFORE GENERATING THE SAME EMPLOYING THE SAME BLOCK USED FOR GENERATING THE LENS TO PRESCRIPTION. THE REFERENCE SURFACE ARE PROVIDED ON THE MOLDED LOW MELTING POINT METAL TYPE BLOCK BY A LENS BLOCKING APARATUS HAVING MATING REFERENCE MOLD SURFACS ON THE INTERIOR WALLS OF THE MOLD CAVITY.
Inventors
- 👤 Richard J Mccall
- 👤 Robert C Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:22
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/20; C03B23/22; B; B24; B24B; B24B13/00; B24B13/005; B24B13/0052
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |