Patent US2321154A successfully refreshed from Google Patents.
Patent FR731455A successfully refreshed from Google Patents.
Patent US3471224A successfully refreshed from Google Patents.
US3471224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic and/or a peripheral vision theatrical system
Assignee: Jetru Inc
•
Filing: 1967-02-27
•
Granted: 1969-10-07
•
Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Harvey L Ratliff Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:47
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/02; G03B35/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1313262A
Cited
US1334480A
Cited
US2157099A
Cited
FR934747A
Cited
FR1050728A
Cited
FR1126970A
Cited
US3050870A
Cited
US3189915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |