US3213689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for balancing rotors
Assignee: General Electric Co
•
Filing: 1960-12-29
•
Granted: 1965-10-26
•
Expires: 1980-12-29
Abstract
No abstract record available.
Inventors
- 👤 Dallas E Cain
- 👤 Charles S Duckwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:25
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/14; G01M1/16; G01M1/20
Claims Analysis
Total Claims: 0
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |