US3436581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated flat disc-shaped rotors
Assignee: Philips North America LLC
•
Filing: 1966-08-25
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Granted: 1969-04-01
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Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 Wilhelmus Hendrikus Donselaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:17
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A LAMINATED FLAT DISC-SHAPED ROTOR FOR USE IN AN ELECTRIC MACHINE, COMPRISING A PLURALITY OF LAMINATED ROTOR SEGMENTS OF FERROMAGNETIC MATERIAL, THE LAMINATIONS OF EACH SEGMENT BEING LOCATED ON EACH SIDE OF A CIRCULAR PLATE OF NONMAGNETIZABLE MATERIAL, SAID CIRCULAR PLATE AND EACH LAMINATION OF SAID PLURALITY OF SEGMENTS BEING
Claim 2
Dependent Claim
50 words
A LAMINATED FLAT DISC-SHAPED ROTOR FOR USE IN AN ELECTRIC MACHINE, COMPRISING A PLURALITY OF LAMINATED ROTOR SEGMENTS OF FERROMAGNETIC MATERIAL, THE LAMINATIONS OF EACH SEGMENT BEING LOCATED ON EACH SIDE OF A CIRCULAR PLATE OF NONMAGNETIZABLE MATERIAL, SAID CIRCULAR PLATE AND EACH LAMINATION OF SAID PLURALITY OF SEGMENTS BEING
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |