US3039349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical device having light filtering means
Assignee: Northrop Grumman Corp
•
Filing: 1959-10-19
•
Granted: 1962-06-19
•
Expires: 1979-10-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Rodgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:12
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/205; G02B27/00; G02B27/0018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2450746A
Cited
US942589A
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US1525657A
Cited
US1687119A
Cited
US1647435A
Cited
US2447828A
Cited
US2579543A
Cited
US2611294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |