Patent US2803884A successfully refreshed from Google Patents.
US2803884A
Expired / Lapsed
US
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Lens marking devices
Assignee: American Optical Corp
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Filing: 1955-01-31
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Granted: 1957-08-27
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Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Herman M Polley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:33
CPC Classifications
G; G01; G01M; G01M11/00; G01M11/02; G01M11/0207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US425495A
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US1026124A
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US1255127A
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US2146599A
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US2712180A
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US2680296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |