US2985784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical image-forming devices
Assignee: American Optical Corp
•
Filing: 1958-08-18
•
Granted: 1961-05-23
•
Expires: 1978-08-18
Abstract
No abstract record available.
Inventors
- 👤 Stephen M Macneille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/24; H01J29/86; H01J29/89; H01J29/892
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2354591A
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US2510106A
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US2577368A
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US2879325A
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US2805360A
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US2842697A
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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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |