US3401593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection system for reflected images utilizing polarized light
Assignee: Individual
•
Filing: 1965-10-11
•
Granted: 1968-09-17
•
Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 Altman Gerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:39
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2167149A
Cited
US2437061A
Cited
US2944463A
Cited
US3277782A
Cited
US3310900A
Cited
US3285126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |