US3264619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical film metal cores
Assignee: International Business Machines Corp
•
Filing: 1962-05-25
•
Granted: 1966-08-02
•
Expires: 1982-05-25
Abstract
No abstract record available.
Inventors
- 👤 Riseman Jacob
- 👤 Quinton W Simkins
- 👤 Barry L Flur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:16
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; C; C25; C25D; C25D5/00; C25D5/007; C25D5/009; C25D7/00; C25D7/001; C25D7/06; C25D7/0607; H01F10/12; H01F10/14; H01F41/00; H01F41/14; H01F41/24; H01F41/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
AN INDIVIDUAL CLOSED FLUX BISTABLE MAGNETIC CORE HAVING HIGH SPEED SWITCHING CHARACTERISTICS COMPRISING: A HOLLOW CYLINDRICAL SILICEOUS SUBSTRATE LESS THAN APPROXIMATELY 100 MILS IN LENGTH; A LAYER OF NOBLE METAL LESS THAN 5,000 ANGSTROM UNITS IN THICKNESS OVER THE EXTERNAL SURFACE OF SAID SUBSTRATE; A VACUUM DEPOSITED ADHESIVE METALLIC LAYER BETWEEN SAID SUBSTRATE AND SAID NOBLE METAL LAYER; SAID ADHESIVE METALLIC LAYER BEING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, TITANIUM AND AN ALLOY OF NICKEL AND CHROMIUM; AND A NICKEL-IRON ALLOY LAYER COVERING SAID NOBLE METAL LAYER HAVING AT LEAST A SUBSTANTIALLY CIRCUMFERENTIALLY MAGNETIC ORIENTATION AND BEING BETWEEN 3,000 AND 15,000 ANGSTROM UNITS IN THICKNESS.
Claim 2
Dependent Claim
108 words
AN INDIVIDUAL CLOSED FLUX BISTABLE MAGNETIC CORE HAVING HIGH SPEED SWITCHING CHARACTERISTICS COMPRISING: A HOLLOW CYLINDRICAL SILICEOUS SUBSTRATE LESS THAN APPROXIMATELY 100 MILS IN LENGTH; A LAYER OF NOBLE METAL LESS THAN 5,000 ANGSTROM UNITS IN THICKNESS OVER THE EXTERNAL SURFACE OF SAID SUBSTRATE; A VACUUM DEPOSITED ADHESIVE METALLIC LAYER BETWEEN SAID SUBSTRATE AND SAID NOBLE METAL LAYER; SAID ADHESIVE METALLIC LAYER BEING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, TITANIUM AND AN ALLOY OF NICKEL AND CHROMIUM; AND A NICKEL-IRON ALLOY LAYER COVERING SAID NOBLE METAL LAYER HAVING AT LEAST A SUBSTANTIALLY CIRCUMFERENTIALLY MAGNETIC ORIENTATION AND BEING BETWEEN 3,000 AND 15,000 ANGSTROM UNITS IN THICKNESS.
References Cited (Backward Citations)
US2985948A
Cited
US3068554A
Cited
US2934748A
Cited
US2910748A
Cited
US3183492A
Cited
US3197749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |