US2907680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stress relieved thin magnetic films
Assignee: International Business Machines Corp
•
Filing: 1958-01-23
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Granted: 1959-10-06
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Expires: 1978-01-23
Abstract
No abstract record available.
Inventors
- 👤 Robert S Smith
- 👤 John S Eggenberger
- 👤 Kenneth B Scow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:41
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/26; H01F10/30; C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/38; C23; C23C; C23C14/00; C23C14/02; C23C14/024; G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/71; G11B5/74; H01F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
AS AN ARTICLE OF MANUFACTURE, A MAGNETIC DEVICE SUITABLE FOR USE IN COMPUTER TYPE MECHANISMS, COMPRISING IN A COMBINATION, A THIN MAGNETIC FILM, A SUPPORT MEMBER, AND A SMOOTH MOLECULAR LAYER OF LUBRICATING MATERIAL POSSESSING POLAR AND NON-POLAR GROUPS THEREIN INTERMEDIATE SAID FILM AND SUPPORT MEMBER, SAID LAYER BEING WETTED TO SAID SUPPORT MEMBER AND NON-REACTIVE THEREWITH, SAID LAYER ALSO BEING NON-VOLATILE AT LOW PRESSURES, SAID DEVICE EXHIBITING UNIFORM MAGNETIC PROPERTIES.
Claim 2
Dependent Claim
71 words
AS AN ARTICLE OF MANUFACTURE, A MAGNETIC DEVICE SUITABLE FOR USE IN COMPUTER TYPE MECHANISMS, COMPRISING IN A COMBINATION, A THIN MAGNETIC FILM, A SUPPORT MEMBER, AND A SMOOTH MOLECULAR LAYER OF LUBRICATING MATERIAL POSSESSING POLAR AND NON-POLAR GROUPS THEREIN INTERMEDIATE SAID FILM AND SUPPORT MEMBER, SAID LAYER BEING WETTED TO SAID SUPPORT MEMBER AND NON-REACTIVE THEREWITH, SAID LAYER ALSO BEING NON-VOLATILE AT LOW PRESSURES, SAID DEVICE EXHIBITING UNIFORM MAGNETIC PROPERTIES.
References Cited (Backward Citations)
US2734033A
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US2273704A
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US2185300A
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US2139640A
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GB670993A
Cited
US2700623A
Cited
US2794180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |