US3267484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic storage drum
Assignee: Unisys Corp
•
Filing: 1962-06-25
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Granted: 1966-08-16
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Robert W Roedder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:05
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/02; B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; G11B5/00; G11B5/74; G11B5/76; B29C33/00; B29C33/56; B29C33/60; B29C41/00; B29C41/02; B29C41/04; B29C41/042; B29K; B29K2105/00; B29K2105/06; B29K2105/12; B29L; B29L2031/00; B29L2031/32; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A MAGNETIC STORAGE DEVICE OF THE DRUM TYPE COMPRISING A HOLLOW TUBULAR SHAFT, A CYLINDER OF FOAM PLASTIC SURROUNDING SAID SHAFT, TORQUE TRANSMISSION ELEMENTS CONNECTED TO SAID SHAFT AND EXTENDING INTO SAID CYLINDER, A SHEATH OF PLASTIC SURROUNDING SAID CYLINDER OF PLASTIC FOAM, AND A COATING OF MAGNETIZABLE MATERIAL ON SAID SHEATH.
Claim 2
Dependent Claim
52 words
A MAGNETIC STORAGE DEVICE OF THE DRUM TYPE COMPRISING A HOLLOW TUBULAR SHAFT, A CYLINDER OF FOAM PLASTIC SURROUNDING SAID SHAFT, TORQUE TRANSMISSION ELEMENTS CONNECTED TO SAID SHAFT AND EXTENDING INTO SAID CYLINDER, A SHEATH OF PLASTIC SURROUNDING SAID CYLINDER OF PLASTIC FOAM, AND A COATING OF MAGNETIZABLE MATERIAL ON SAID SHEATH.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |