US2420503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical reticle
Assignee: Bell and Howell Co
•
Filing: 1944-08-31
•
Granted: 1947-05-13
•
Expires: 1964-08-31
Abstract
No abstract record available.
Inventors
- 👤 Stechbart Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:18
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/02; G02B23/10; G02B27/00; G02B27/32; G02B27/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US533324A
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US540184A
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US1646292A
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US1475430A
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US1692973A
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US1726314A
Cited
US1992608A
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US1918705A
Cited
US2061097A
Cited
GB437444A
Cited
US2271196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |