US2478026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for beveling commutator segments
Assignee: Individual
•
Filing: 1947-05-13
•
Granted: 1949-08-02
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Expires: 1967-05-13
Abstract
No abstract record available.
Inventors
- 👤 David J Thorell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:59
CPC Classifications
B; B23; B23D; B23D79/00; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2202; Y10T407/2272; Y10T407/2282; Y10T407/2286; Y10T409/00; Y10T409/50; Y10T409/501476
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |