US3411944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat stable magnetic coating composition
Assignee: Memorex Corp
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Filing: 1965-06-14
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Granted: 1968-11-19
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Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Louis M Higashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:32
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7021; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3893; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8022; C08G18/8029; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A MAGNETIC RECORDING MEDIA WHICH COMPRISES A SUPPORT MEANS AND A MAGNETIC PIGMENT DISPERSED IN A POLYMERIC BINDER COATED ON SAID SUPPORT MEANS WHERE SAID BINDER COMPRISES: (A) A LOW MOLECULAR WEIGHT DIOL SELECTED FROM THE CLASS CONSISTING OF PRIMARY AND SECONDARY ALIPHATIC GLYCOLS CONTAINING 2 TO 22 CARBON ATOMS, POLYETHER GLYCOLS CONTAINING 4 TO 22 CARBON ATOMS AND POLYESTER GLYCOLS HAVING A HYDROXYL NUMBER OF 10 TO 100 AND HAVING THE FOLLOWING GENERAL FORMULA
Claim 2
Dependent Claim
75 words
A MAGNETIC RECORDING MEDIA WHICH COMPRISES A SUPPORT MEANS AND A MAGNETIC PIGMENT DISPERSED IN A POLYMERIC BINDER COATED ON SAID SUPPORT MEANS WHERE SAID BINDER COMPRISES: (A) A LOW MOLECULAR WEIGHT DIOL SELECTED FROM THE CLASS CONSISTING OF PRIMARY AND SECONDARY ALIPHATIC GLYCOLS CONTAINING 2 TO 22 CARBON ATOMS, POLYETHER GLYCOLS CONTAINING 4 TO 22 CARBON ATOMS AND POLYESTER GLYCOLS HAVING A HYDROXYL NUMBER OF 10 TO 100 AND HAVING THE FOLLOWING GENERAL FORMULA
References Cited (Backward Citations)
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Cited
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Cited
US2901467A
Cited
US3150995A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |