US3608350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for producing blanks for commutators for miniature electric devices
Assignee: Individual
•
Filing: 1969-03-04
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Granted: 1971-09-28
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Expires: 1989-03-04
Abstract
Abstract THE PRESENT METHOD AND APPARATUS IS FOR PRODUCING COMMUTATOR BLANKS FOR MINIATURE ELECTRIC DEVICES WHEREIN A TUBE BLANK MADE OF MATERIALS HAVING GOOD ELECTRICAL CONDUCTIVITY IS FED INTO A DIE HAVING A NUMBER OF GROOVES CORRESPONDING TO THE NUMBER OF BRIDGE PIECES OF THE COMMUTATOR AND PRESSED BY MEANS OF A PUNCH PROVIDED WITH A NUMBER OF TEETH SIMILAR TO THAT OF THE COMMUTATOR BARS OR SEGMENTS WHOSE ADJOINING BARS OR SEGMENTS ARE CONNECTED TOGETHER BY BRIDGE PIECES.
Inventors
- 👤 Terumoto Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:45
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/06; H01R43/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011
Claims Analysis
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |