US3083311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Converters and circuits for high frequency fluorescent lighting
Assignee: Individual
•
Filing: 1956-11-08
•
Granted: 1963-03-26
•
Expires: 1976-11-08
Abstract
No abstract record available.
Inventors
- 👤 Krasnow Shelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:08
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/274; H02K1/2753; H02K1/276
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A ROTOR FOR DYNAMO-ELECTRIC MACHINES, A CENTRAL SUPPORTING STRUCTURE INCLUDING A PORTION OF FERRO-MAGNETIC MATERIAL, INDIVIDUAL PERMANENT MAGNETS MOUNTED UPON AND IN CONTACT WITH SAID FERRO-MAGNETIC PORTION, EACH MAGNET DEFINING A POLE OF SAID ROTOR, EACH MAGNET BEING OF TAPERED FORM AND HAVING RESPECTIVELY A LOWER AND AN UPPER BASE, THE LOWER BASE, IN CONTACT WITH SAID FERRO-MAGNETIC PORTION, BEING OF GREATER AREA THAN SAID UPPER BASE, AND POLE PIECES OF FERRO-MAGNETIC MATERIAL IN CONTACT WITH SAID UPPER BASES AND PROJECTING LATERALLY
Claim 2
Dependent Claim
83 words
IN A ROTOR FOR DYNAMO-ELECTRIC MACHINES, A CENTRAL SUPPORTING STRUCTURE INCLUDING A PORTION OF FERRO-MAGNETIC MATERIAL, INDIVIDUAL PERMANENT MAGNETS MOUNTED UPON AND IN CONTACT WITH SAID FERRO-MAGNETIC PORTION, EACH MAGNET DEFINING A POLE OF SAID ROTOR, EACH MAGNET BEING OF TAPERED FORM AND HAVING RESPECTIVELY A LOWER AND AN UPPER BASE, THE LOWER BASE, IN CONTACT WITH SAID FERRO-MAGNETIC PORTION, BEING OF GREATER AREA THAN SAID UPPER BASE, AND POLE PIECES OF FERRO-MAGNETIC MATERIAL IN CONTACT WITH SAID UPPER BASES AND PROJECTING LATERALLY
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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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |