Patent US4410878A successfully refreshed from Google Patents.
US3250482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape cartridge
Assignee: 3M Co
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Filing: 1963-11-05
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Granted: 1966-05-10
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Expires: 1983-11-05
Abstract
No abstract record available.
Inventors
- 👤 Ronald L Whitnah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:10
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/107; Y; Y10; Y10S; Y10S242/00; Y10S242/914
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A RECORDING TAPE CARTRIDGE INCLUDING A BOX-LIKE CONTAINER HAVING TWO PARALLEL SPACED SIDE WALLS, A PRECISELY DIMENSIONED SMOOTH SURFACED RIGID CYLINDRICAL SLEEVE, A BARREL NUT HAVING RADIALLY FLEXIBLE PORTIONS DISPOSED COAXIALLY INSIDE THE SLEEVE AND SECURED TO ONE OF SAID SIDE WALLS, A CONNECTOR ASSOCIATED WITH THE BARREL NUT AND SECURED TO THE OTHER OF SAID SIDE WALLS, MEANS EXPANDING SAID BARREL NUT PORTIONS INTO FRICTIONAL ENGAGEMENT WITH THE SLEEVE RIGIDLY SECURING THE SLEEVE BETWEEN THE SIDE WALLS WITH ITS AXIS SUBSTANTIALLY NORMAL THERETO, A REEL MOUNTED WITHIN THE CONTAINER HAVING A HUB PROVIDING CYLINDRICAL BORE MEANS JOURNALLING THE REEL ON SAID SLEEVE, AND MEANS LUBRICATING THE CONTACT AREAS BETWEEN THE HUB AND SLEEVE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |