US3494698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feedback control device for stabilization of interference fringes
Assignee: United States Department of the Air Force
•
Filing: 1967-02-21
•
Granted: 1970-02-10
•
Expires: 1987-02-21
Abstract
No abstract record available.
Inventors
- 👤 Don B Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:25
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/04; G03H1/0486; G03H2001/0489; Y; Y10; Y10S; Y10S359/00; Y10S359/902
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3170122A
Cited
US3202052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |