US3484599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical projection system
Assignee: WILLIAM D LITTLE
•
Filing: 1967-01-03
•
Granted: 1969-12-16
•
Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 William D Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:56
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/04; G; G02; G02B; G02B3/00; G02B3/0006; G02B3/0037; G02B3/0043; G02B3/005; G02B3/0062; F21W; F21W2131/00; F21W2131/40; F21W2131/406
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1678861A
Cited
US2220639A
Cited
US2182155A
Cited
US2253409A
Cited
US2366356A
Cited
US2712060A
Cited
US2848601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |