US3013114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device with contrast improving optical filter
Assignee: WARWICK Manufacturing CORP
•
Filing: 1958-02-21
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Granted: 1961-12-12
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Expires: 1978-02-21
Abstract
No abstract record available.
Inventors
- 👤 Jack E Bridges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:25
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/185; H01J29/86; H01J29/89; H01J29/898
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1694706A
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US2222414A
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US2494992A
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US2420168A
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US2644854A
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US2691774A
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US2599739A
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US2655452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |