US3271204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated cores
Assignee: Northrop Grumman Systems Corp
•
Filing: 1957-11-29
•
Granted: 1966-09-06
•
Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 John P Glass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:23
CPC Classifications
H; H01; H01F; H01F1/00; H01F41/00; H01F41/02; H01F41/0206; H01F41/0233
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
IN A METHOD OF MAKING A LAMINATION USEFUL IN A SYNCHRO, THE STEPS COMPRISING TAKING A RING-SHAPED LAMINATION COMPOSED OF 50% NICKEL AND 50% IRON, ANNEALING SAID LAMINATION AT 1700*F., COMPRESSING SELECTED AREAS OF SAID LAMINATION WHICH AREAS ARE SPACED FROM EACH OTHER THROUGHOUT THE LAMINATION, SO AS TO RAISE THE LOWER KEE OF ITS PERMEABILITY CURVE AT 0.2 GILBERT PER CENTIMETER OF LENGTH OF 4100 GAUSSES, AND TO LOWER THE UPPER KEEN OF ITS PERMEABILITY CURVE TO 9,400 GAUSSES AT 0.5 GILBERT PER
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |