US1759500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator-assembly apparatus
Assignee: Individual
•
Filing: 1927-06-07
•
Granted: 1930-05-20
•
Expires: 1947-06-07
Abstract
No abstract record available.
Inventors
- 👤 Louis T Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:59
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/06; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5192; Y10T29/53; Y10T29/5313; Y10T29/53143; Y10T29/53148
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) | 1933-05-19 | 1933-11-18 | 1934-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-05-19 | 1937-11-18 | 1938-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-05-19 | 1941-11-18 | 1942-05-20 | $7700.00 | Window Closed / Lapsed |