US3427089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet filter
Assignee: National Aeronautics and Space Administration
•
Filing: 1965-03-12
•
Granted: 1969-02-11
•
Expires: 1985-03-12
Abstract
No abstract record available.
Inventors
- 👤 Samuel J Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:32
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/283; G02B5/285; G02B5/288
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3015253A
Cited
US3200253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |