US3705997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator
Assignee: Individual
•
Filing: 1971-07-09
•
Granted: 1972-12-12
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Expires: 1991-07-09
Abstract
Abstract A HUB OF ELECTRICALLY INSULATING MATERIAL CARRIES A PLURALITY OF ELONGATED ELECTRICALLY CONDUCTIVE LAMELLAS. EACH OF THE LAMELLAS HAS AN EXPOSED CONTACT FACE, A FIRST END PORTION EMBEDDED IN THE MATERIAL OF THE HUB, AN INTERMEDIATE PORTION ALSO EMBEDDED AND A SECOND END PORTION WHICH PROJECTS FROM THE HUB AND IS OF HOOK-SHAPED CONFIGURATION WITH ITS GENERAL PLANE INCLUDING AN ANGLE OF SUBSTANTIALLY 90* WITH THE GENERAL PLANE OF THE EXPOSED CONTACT FACE.
Inventors
- 👤 Oskar Bauerle
- 👤 Wilfried Kubel
- 👤 Ernst Munster
- 👤 Karl Schweikert
- 👤 Georg Strobl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/04; H01R39/06; H01R39/32; H01R43/00; H01R43/06; H01R43/08
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |