US3375752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copyboard lighting system
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1965-02-19
•
Granted: 1968-04-02
•
Expires: 1985-02-19
Abstract
No abstract record available.
Inventors
- 👤 Henry N Fairbanks
- 👤 Jr Thomas M Madigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:33
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/54; G03B27/542; F; F21; F21V; F21V17/00; F21V17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1427251A
Cited
US2617013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |