Patent US3672991A successfully refreshed from Google Patents.
US3672991A
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US
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Magnetized recorder thread
Assignee: JAMES V PHILLIPS
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Filing: 1970-06-02
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Granted: 1972-06-27
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Expires: 1990-06-02
Abstract
Abstract A MAGNETIZED RECORDER THREAD AND METHOD OF MAKING SAME, WHEREIN A TEXTILE THREAD IS EASILY AND ECONOMICALLY IMPREGNATED WITH A MIXTURE OF WAX AND OXIDE AND WHICH CAN BE USED ONLY ONCE AND THEN IS THROWN AWAY IF DESIRED.
Inventors
- 👤 James V Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:11
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/74; G11B5/62; G11B5/68; G11B5/70; G11B5/702; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |