Patent US3501230A successfully refreshed from Google Patents.
US3501230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-dimensional display system
Assignee: Individual
•
Filing: 1966-11-07
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Granted: 1970-03-17
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Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 Robert J Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:43
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/18; G03B35/24; G02; G02B; G02B30/00; G02B30/20; G02B30/26; G02B30/27; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1422149A
Cited
US2075853A
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US2854883A
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US2952182A
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US3006241A
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US3182547A
Cited
US3201797A
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US3339454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |