US3544193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarizing color filter for use in color television systems
Assignee: Individual
•
Filing: 1965-08-31
•
Granted: 1970-12-01
•
Expires: 1985-08-31
Abstract
No abstract record available.
Inventors
- 👤 Peter Laput
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:30
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/07; H; H04; H04N; H04N11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2514043A
Cited
US2493200A
Cited
US2586635A
Cited
US2720553A
Cited
US2753763A
Cited
US2834254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |