US2153986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic control system for selfbalancing measuring instruments
Assignee: Bristol Co
•
Filing: 1937-11-15
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Granted: 1939-04-11
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Expires: 1957-11-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred B Maclaren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:15
CPC Classifications
G; G01; G01R; G01R17/00; G01R17/02; G01R17/06
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) | 1942-04-10 | 1942-10-10 | 1943-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-10 | 1946-10-10 | 1947-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-10 | 1950-10-10 | 1951-04-11 | $7700.00 | Window Closed / Lapsed |