Patent US3229136A successfully refreshed from Google Patents.
US3229136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamo-electric machines
Assignee: Lucas Support Services Ltd
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Filing: 1962-06-06
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Granted: 1966-01-11
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Expires: 1982-06-06
Abstract
No abstract record available.
Inventors
- 👤 Pannell Dennis Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/28; H02K1/24; H02K1/243
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A ROTOR FOR AN ALTERNATING CURRENT GENERATOR COMPRISING A CYLINDRICAL FIELD TUBE, A PLURALITY OF ANGULARLY SPACED APERTURES FORMED IN THE PERIPHERY OF THE FIELD TUBE, A SPIDER FORMED FROM MAGNETIC MATERIAL WITHIN THE FIELD TUBE, SAID SPIDER HAVING A PLURALITY OF EQUI-ANGULARLY SPACED RADIAL LEDS WHICH TERMINATE IN POLE HEADS RESPECTIVELY HAVING THEIR OUTER SURFACES OF PART CYLINDRICAL FORM STRUCK FROM THE AXIS OF THE FIELD TUBE, SAID POLE HEADS BEING SITUATED WITHIN THE APERTURES RESPECTIVELY BUT SPACED FROM
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |