US3058844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition of epoxide resin, methylol phenol ether, polyvinyl methyl ether, and acid anhydride catalyst, and metal substrate coated therewith, especially a magnetic signal storage device
Assignee: International Business Machines Corp
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Filing: 1959-10-13
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Granted: 1962-10-16
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Expires: 1979-10-13
Abstract
No abstract record available.
Inventors
- 👤 Donald D Johnson
- 👤 Flores Ralph
- 👤 Marcel J Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:10
CPC Classifications
C; C09; C09D; C09D163/00; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7023; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31529
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A MAGNETIC SIGNAL STORAGE DEVICE WHICH COMPRISES A NON-MAGNETIC METAL BASE HAVING AN ADHERENT BAKED-ON COATING THAT IS SMOOTH, UNIFORM, HARD, TOUGH, STABLE AT HIGH HUMIDITIES AND POSSESSES GOOD MECHANICAL AND SOLVENT RESISTANT PROPERTIES, SAID BAKED-ON COATING BEING PRODUCED BY BAKING ON SAID ARTICLE A HEAT-HARDENABLE, FILMFORMING COMPOSITION CONSISTING ESSENTIALLY OF AN EPOXIDE RESIN THAT IS A GLYCIDAL POLYETHER OF A POLYHYDRIC PHENOL HAVING AN EPOXIDE EQUIVALENT IN EXCESS OF ABOUT 450, A METHYLOL PHENOL ETHER WHICH IS CROSS-POLYMERIZABLE WITH THE EPOXIDE RESIN, POLYVINYL METHYL ETHER, A COMPATIBLE ACID ANHYDRIDE CATALYST THAT IS STABLE AT ROOM TEMPERATURE, AND FERRO-MAGNETIC MATERIAL TO PROVIDE FOR SIGNAL RECORDING AND STORAGE.
Claim 2
Dependent Claim
107 words
A MAGNETIC SIGNAL STORAGE DEVICE WHICH COMPRISES A NON-MAGNETIC METAL BASE HAVING AN ADHERENT BAKED-ON COATING THAT IS SMOOTH, UNIFORM, HARD, TOUGH, STABLE AT HIGH HUMIDITIES AND POSSESSES GOOD MECHANICAL AND SOLVENT RESISTANT PROPERTIES, SAID BAKED-ON COATING BEING PRODUCED BY BAKING ON SAID ARTICLE A HEAT-HARDENABLE, FILMFORMING COMPOSITION CONSISTING ESSENTIALLY OF AN EPOXIDE RESIN THAT IS A GLYCIDAL POLYETHER OF A POLYHYDRIC PHENOL HAVING AN EPOXIDE EQUIVALENT IN EXCESS OF ABOUT 450, A METHYLOL PHENOL ETHER WHICH IS CROSS-POLYMERIZABLE WITH THE EPOXIDE RESIN, POLYVINYL METHYL ETHER, A COMPATIBLE ACID ANHYDRIDE CATALYST THAT IS STABLE AT ROOM TEMPERATURE, AND FERRO-MAGNETIC MATERIAL TO PROVIDE FOR SIGNAL RECORDING AND STORAGE.
References Cited (Backward Citations)
US2683131A
Cited
US2687396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |