Patent US3241781A successfully refreshed from Google Patents.
US3241781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless tape cartridge
Assignee: AUDIOTAPE CORP
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Filing: 1963-08-21
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Granted: 1966-03-22
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Expires: 1983-08-21
Abstract
No abstract record available.
Inventors
- 👤 Austin A Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:14
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A MAGAZINE FOR AN ENDLESS RECORDING TAPE COMPRISING: (A) A CASING HAVING A BOTTOM WALL AND SIDE WALLS (B) AT LEAST ONE APERTURE IN ONE OF SAID SIDE WALLS; (C) A SPINDLE FIXED TO AND EXTENDING PERPENDICULARLY FROM SAID BOTTOM WALL; (C) A TAPE SUPPORTING DISC SEPARATE FROM THE SPINDLE AND ROTATABLY MOUNTED THEREON ADJACENT SAID BOTTOM WALL FOR SUPPORTING ONE EDGE OF A COIL OF TAPE; (E) A HUB SUBSTANTIALLY INDEPENDENT OF AND OVERLYING SAID DISC FOR ENGAGING THE INNERMOST CONVOLUTION OF SAID COIL OF TAPE, SAID HUB BEING ROTATABLY MOUNTED ABOUT SAID SPINDLE AND IN ENGAGEMENT THEREWITH WHEREBY FRICTIONAL FORCES CREATED BETWEEN SAID SPINDLE AND HUB UPON ROTATION OF SAID HUB ARE RESTRAINED FROM EFFECTING ROTATION OF SAID DISC; (F) TAPE GUIDE MEANS FOR DIRECTING THE TAPE FROM THE
Claim 2
Dependent Claim
131 words
A MAGAZINE FOR AN ENDLESS RECORDING TAPE COMPRISING: (A) A CASING HAVING A BOTTOM WALL AND SIDE WALLS (B) AT LEAST ONE APERTURE IN ONE OF SAID SIDE WALLS; (C) A SPINDLE FIXED TO AND EXTENDING PERPENDICULARLY FROM SAID BOTTOM WALL; (C) A TAPE SUPPORTING DISC SEPARATE FROM THE SPINDLE AND ROTATABLY MOUNTED THEREON ADJACENT SAID BOTTOM WALL FOR SUPPORTING ONE EDGE OF A COIL OF TAPE; (E) A HUB SUBSTANTIALLY INDEPENDENT OF AND OVERLYING SAID DISC FOR ENGAGING THE INNERMOST CONVOLUTION OF SAID COIL OF TAPE, SAID HUB BEING ROTATABLY MOUNTED ABOUT SAID SPINDLE AND IN ENGAGEMENT THEREWITH WHEREBY FRICTIONAL FORCES CREATED BETWEEN SAID SPINDLE AND HUB UPON ROTATION OF SAID HUB ARE RESTRAINED FROM EFFECTING ROTATION OF SAID DISC; (F) TAPE GUIDE MEANS FOR DIRECTING THE TAPE FROM THE
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |