Patent US3674520A successfully refreshed from Google Patents.
US3239705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric rotating machine
Assignee: Tri Tech Inc
•
Filing: 1961-07-13
•
Granted: 1966-03-08
•
Expires: 1981-07-13
Abstract
No abstract record available.
Inventors
- 👤 Richard J Kavanaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:42
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/26; H02K23/00; H02K23/54
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
IN A D.C. ELECTRIC ROTATING MACHINE, A DISC-SHAPED ROTOR COMPRISING PRINTED CIRCUIT CONDUCTORS ARRANGED TO FORM COMPOSITE WINDING MEANS DISTRIBUTED ON OPPOSITE FACES OF THE DISC, EACH OF SAID PRINTED CIRCUIT CONDUCTORS HAVING A FIRST AND SECOND END PORTION, MEANS INTERMEDIATE THE CENTER AND THE PERIPHERY OF SAID DISC FOR INTERCONNECTING PAIRS OF THE SAID FIRST END PORTIONS ON SAID OPPOSITE DISC FACES, A COMMUTATOR CONNECTED TO THE SAID SECOND END PORTIONS OF THE CONDUCTORS ON ONE FACE OF SAID DISC, AND MEANS INCLUDING A RING-SHAPED MEMBER INTERCONNECTING THE SAID SECOND END PORTIONS OF THE CONDUCTORS ON THE OPPOSITE FACE OF SAID DISC WITH ONE ANOTHER.
References Cited (Backward Citations)
US2773239A
Cited
US2722617A
Cited
US2853637A
Cited
US2847589A
Cited
FR1232438A
Cited
US3095516A
Cited
FR1233656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |