US2800052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination wide angle and telephoto lens attachment
Assignee: EDNALITE OPTICAL Co Inc
•
Filing: 1955-07-12
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Granted: 1957-07-23
•
Expires: 1975-07-12
Abstract
No abstract record available.
Inventors
- 👤 Edwin W Bechtold
- 👤 Kapilow Marvin
- 👤 Alex J Weinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:42
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US756779A
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US1025057A
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US1651493A
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US1671558A
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FR722817A
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US1934561A
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US1925393A
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US2157547A
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US2056421A
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US2184018A
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US2284757A
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US2324057A
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US2322399A
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US2331667A
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US2487773A
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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) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |