Patent US3471272A successfully refreshed from Google Patents.
US3471272A
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US
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Magnetic storage medium
Assignee: Thin Film Inc
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Filing: 1966-09-20
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Granted: 1969-10-07
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Expires: 1986-09-20
Abstract
No abstract record available.
Inventors
- 👤 George E Wilhelm
- 👤 Stanley S Nagy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/06; G; G11; G11B; G11B5/00; G11B5/62; G11B5/73; G11B5/7368; G11B5/7369; G11B5/739; G11B5/73911; G11B5/73917; G11B5/73919; Y; Y10; Y10S; Y10S205/00; Y10S205/917; Y10S205/922; Y10S428/00; Y10S428/90; Y10S428/922; Y10S428/9265; Y10S428/928; Y10S428/9335; Y10S428/936; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/1259; Y10T428/12736; Y10T428/1275; Y10T428/12764; Y10T428/12771; Y10T428/12861; Y10T428/12882; Y10T428/12951; Y10T428/12986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |