US3469904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Night vision performance tester
Assignee: Indiana University Foundation Inc
•
Filing: 1966-09-16
•
Granted: 1969-09-30
•
Expires: 1986-09-16
Abstract
No abstract record available.
Inventors
- 👤 Merrill J Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:25
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/06; A61B3/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1564495A
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US1823707A
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US2234240A
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US2947232A
Cited
US2958762A
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US3001015A
Cited
US3214596A
Cited
US3355237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |