US3445153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopic and scotopic 3-dimensional viewing system
Assignee: MORTIMER M MARKS
•
Filing: 1966-04-06
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Granted: 1969-05-20
•
Expires: 1986-04-06
Abstract
No abstract record available.
Inventors
- 👤 Alvin M Marks
- 👤 Mortimer M Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:06
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/22; G02B30/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL50187C
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GB104069A
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US1422527A
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US1843663A
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US2136303A
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US2338298A
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US2345777A
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US2623433A
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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) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |