US2156012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating instrument for aircraft
Assignee: Pioneer Instrument Co Inc
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Filing: 1935-05-25
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Granted: 1939-04-25
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Expires: 1955-05-25
Abstract
No abstract record available.
Inventors
- 👤 Doyle Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:21
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/02; B64C25/08; B64C25/10; B64C25/18; B64C25/26; B64C25/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-04-24 | 1942-10-24 | 1943-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-24 | 1946-10-24 | 1947-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-24 | 1950-10-24 | 1951-04-25 | $7700.00 | Window Closed / Lapsed |