Patent US2904890A successfully refreshed from Google Patents.
US2904890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical target
Assignee: Lockheed Martin Corp
•
Filing: 1957-07-01
•
Granted: 1959-09-22
•
Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Tommy F Vajda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:03
CPC Classifications
F; F42; F42B; F42B35/00; F42B15/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |