US3455683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making reticle using a three-layer photoelectric element
Assignee: Bausch and Lomb Inc
•
Filing: 1964-08-05
•
Granted: 1969-07-15
•
Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Letter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/705; G03G; G03G17/00; G03G17/02; G03G5/00; G03G5/02; G03G5/04; G03G5/153; Y; Y10; Y10S; Y10S148/00; Y10S148/064; Y10S148/072; Y10S430/00; Y10S430/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB188030A
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US2021286A
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US2782319A
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US2866903A
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US3051860A
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US3088883A
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US3085051A
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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) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |