US3204155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic structure having a fixed and variable air gap
Assignee: Individual
•
Filing: 1961-07-31
•
Granted: 1965-08-31
•
Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Charpentier Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:26
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/16; H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A MAGNET COMPOSED OF AN ALUMINUM-NICKEL-COBALTCOPPER-IRON BASE COMPOSITION, AND HAVING A LENGTH L BETWEEN $S/2 AND $S, THE MAGNET BEING COMBINED WITH POLE PIECES ARRANGED TO PROVIDE A DOUBLE NON-MAGNETIC GAP OF WHICH ONE IS FIXED AND THE OTHER VARIABLE, THE DIMENSIONS OF THE FIXED GAP SATISFYING THE FOLLOWING CONDITIONS:
Claim 2
Dependent Claim
50 words
A MAGNET COMPOSED OF AN ALUMINUM-NICKEL-COBALTCOPPER-IRON BASE COMPOSITION, AND HAVING A LENGTH L BETWEEN $S/2 AND $S, THE MAGNET BEING COMBINED WITH POLE PIECES ARRANGED TO PROVIDE A DOUBLE NON-MAGNETIC GAP OF WHICH ONE IS FIXED AND THE OTHER VARIABLE, THE DIMENSIONS OF THE FIXED GAP SATISFYING THE FOLLOWING CONDITIONS:
References Cited (Backward Citations)
US2812203A
Cited
US3095525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |