US2970069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording composition and device
Assignee: Individual
•
Filing: 1957-07-17
•
Granted: 1961-01-31
•
Expires: 1977-07-17
Abstract
No abstract record available.
Inventors
- 👤 Adams Pierrepont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:55
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/004; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/269; Y10T428/31504; Y10T428/31678; Y10T428/31688
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A MAGNETIC RECORDING SURFACE CONSISTING OF A METAL BASE AND A UNIFORM, HARD MAGNETIC RECORDING MEDIUM ADHERED THERETO, SAID MEDIUM CONSISTING ESSENTIALLY OF A SUBSTANTIALLY UNIFORM LAYER OF THERMOSETTING RESIN SELECTED FROM THE GROUP CONSISTING OF ALKYLATED UREA FORMALDEHYDE RESINS, ALKYLATED MELAMINE FORMALDEHYDE RESINS, ALKYLATED BENZOGUANAMINE FORMALDEHYDE RESINS AND MIXTURES THEREOF, SAID ALKLY GROUPS CONTAINING 3 TO 8 CARBON ATOMS, SAID THERMOSETTING RESIN BEING BLENDED WITH A GLYCERYL PHTHALATE RESIN, SAID ENTIRE COMPOSITION CONTAINING UNIFORMLY DISPERSED THEREIN A MAGNETIC IRON OXIDE, SAID COATING BEING OF A UNIFORM THICKNESS WITHIN PLUS OF MINUS 5 PERCENT OF NOMINAL THICKNESS WHICH IS FROM ABOUT 0.001 INCH TO ABOUT 0.005 INCH.
Claim 2
Dependent Claim
107 words
A MAGNETIC RECORDING SURFACE CONSISTING OF A METAL BASE AND A UNIFORM, HARD MAGNETIC RECORDING MEDIUM ADHERED THERETO, SAID MEDIUM CONSISTING ESSENTIALLY OF A SUBSTANTIALLY UNIFORM LAYER OF THERMOSETTING RESIN SELECTED FROM THE GROUP CONSISTING OF ALKYLATED UREA FORMALDEHYDE RESINS, ALKYLATED MELAMINE FORMALDEHYDE RESINS, ALKYLATED BENZOGUANAMINE FORMALDEHYDE RESINS AND MIXTURES THEREOF, SAID ALKLY GROUPS CONTAINING 3 TO 8 CARBON ATOMS, SAID THERMOSETTING RESIN BEING BLENDED WITH A GLYCERYL PHTHALATE RESIN, SAID ENTIRE COMPOSITION CONTAINING UNIFORMLY DISPERSED THEREIN A MAGNETIC IRON OXIDE, SAID COATING BEING OF A UNIFORM THICKNESS WITHIN PLUS OF MINUS 5 PERCENT OF NOMINAL THICKNESS WHICH IS FROM ABOUT 0.001 INCH TO ABOUT 0.005 INCH.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |