US2668618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator testing apparatus
Assignee: Redmond Co Inc
•
Filing: 1948-04-29
•
Granted: 1954-02-09
•
Expires: 1968-04-29
Abstract
No abstract record available.
Inventors
- 👤 Seelhoff Manley Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:37
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/327; G01R31/3277
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1372945A
Cited
US1768449A
Cited
US1412051A
Cited
US1690345A
Cited
US1808301A
Cited
US1971426A
Cited
US1842810A
Cited
US2220489A
Cited
US2229638A
Cited
US2264873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |