US2615330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weight and balance indicator
Assignee: Douglas Aircraft Co Inc
•
Filing: 1945-11-13
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Granted: 1952-10-28
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Expires: 1965-11-13
Abstract
No abstract record available.
Inventors
- 👤 Truett M Blackmon
- 👤 Firmin D Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:22
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/12; G01M1/122; G01M1/125; G01B; G01B7/00; G01B7/16; G01B7/24; G01G; G01G19/00; G01G19/02; G01G19/07; G01G19/08; G01G19/12; G01L; G01L1/00; G01L1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1407078A
Cited
US2443098A
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US2231702A
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US2336371A
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US2373504A
Cited
US2443045A
Cited
US2394079A
Cited
US2453607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |