US3515484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable vacuum chuck for holding lenses having different radii during optical examination
Assignee: Bausch and Lomb Inc
•
Filing: 1968-05-16
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Granted: 1970-06-02
•
Expires: 1988-05-16
Abstract
No abstract record available.
Inventors
- 👤 Robert H De Normand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:42
CPC Classifications
B; B25; B25B; B25B11/00; B25B11/005; B25B11/007; B24; B24B; B24B13/00; B24B13/005; G; G01; G01M; G01M11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2352180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |