US3450477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system
Assignee: Bausch and Lomb Inc
•
Filing: 1965-06-25
•
Granted: 1969-06-17
•
Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Robert J Meltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:17
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2442396A
Cited
US3016789A
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US2998746A
Cited
US3200698A
Cited
US3274883A
Cited
US3241430A
Cited
US3284632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |