Patent US3339993A successfully refreshed from Google Patents.
US3339993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic strip storage cells
Assignee: International Business Machines Corp
•
Filing: 1966-04-04
•
Granted: 1967-09-05
•
Expires: 1986-04-04
Abstract
No abstract record available.
Inventors
- 👤 David L Stoddard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
G; G06; G06K; G06K17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
FOR USE WITH A LARGE CAPACITY DATA STORAGE DEVICE WHICH EMPLOYS STRIPS OF FLEXIBLE TAPE AS A RECORDING MEDIUM, AN ELONGATED HOLLOW CELL HAVING ONE CLOSED END AND ONE OPEN END, AND FRONT AND REAR SECTIONS SPACED APART BY PLANAR CONVERGENT SIDE SURFACES, THE INTERIOR FO THE CELL BEING PROVIDED WITH PAIRS OF CLOSELY-SPACED OPPOSITELY-EXTENDING LONGITUDINAL GROOVES FORMED IN THE INNER SURFACES OF THE FRONT AND REAR SECTIONS, AND STRIP RESTRAINING MEANS PROTRUDING FROM THE UPPER END OF THE CELL IN ALIGNMENT WITH THE LONGITUDINAL GROOVES.
Claim 2
Dependent Claim
86 words
FOR USE WITH A LARGE CAPACITY DATA STORAGE DEVICE WHICH EMPLOYS STRIPS OF FLEXIBLE TAPE AS A RECORDING MEDIUM, AN ELONGATED HOLLOW CELL HAVING ONE CLOSED END AND ONE OPEN END, AND FRONT AND REAR SECTIONS SPACED APART BY PLANAR CONVERGENT SIDE SURFACES, THE INTERIOR FO THE CELL BEING PROVIDED WITH PAIRS OF CLOSELY-SPACED OPPOSITELY-EXTENDING LONGITUDINAL GROOVES FORMED IN THE INNER SURFACES OF THE FRONT AND REAR SECTIONS, AND STRIP RESTRAINING MEANS PROTRUDING FROM THE UPPER END OF THE CELL IN ALIGNMENT WITH THE LONGITUDINAL GROOVES.
References Cited (Backward Citations)
US2722676A
Cited
US3126008A
Cited
US3176279A
Cited
US3176281A
Cited
US3267939A
Cited
US3308451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |