US2681264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polar recording system
Assignee: AIRBORNE INSTR LAB Inc
•
Filing: 1948-10-16
•
Granted: 1954-06-15
•
Expires: 1968-10-16
Abstract
No abstract record available.
Inventors
- 👤 Otto H Schmitt
- 👤 Fredrick R Barnes
- 👤 Wesley A Fails
- 👤 Winfield E Fromm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:33
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |