Patent US3337057A successfully refreshed from Google Patents.
US2968209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement in optical measuring apparatus for wind tunnels
Assignee: Svenska AB Gasaccumulator
•
Filing: 1956-08-24
•
Granted: 1961-01-17
•
Expires: 1976-08-24
Abstract
No abstract record available.
Inventors
- 👤 Aulin Evert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:24
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/08; G02B17/0852; G02B17/008; G02B17/0804; G02B17/0816
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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |