US3241783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flanged spool for tape record carriers
Assignee: US Philips Corp
•
Filing: 1961-11-28
•
Granted: 1966-03-22
•
Expires: 1981-11-28
Abstract
No abstract record available.
Inventors
- 👤 Laa Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:09
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/28; G; G11; G11B; G11B15/00; G11B15/60; G11B15/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A SPOOL FOR TAPE RECORDERS COMPRISING A CORE MEMBER HAVING OPPOSED SIDE FLANGES ATTACHED THERETO, A PAIR OF NON-PARALLEL INVOLUTE SURFACES IN EACH SAID FLANGE DIVERGING OUTWARDLY FROM SAID CORE TO THE PERIPHERY OF EACH SAID FLANGE, SAID SURFACE DEFINING OBLIQUE CO-AXIAL RECESSES IN EACH SAID FLANGE WHEREBY A FILM EXTENSION IS FREELY EJECTED FROM SAID RECESSES UPON ROTATION OF SAID SPOOL IN A GIVEN DIRECTION.
Claim 2
Dependent Claim
66 words
A SPOOL FOR TAPE RECORDERS COMPRISING A CORE MEMBER HAVING OPPOSED SIDE FLANGES ATTACHED THERETO, A PAIR OF NON-PARALLEL INVOLUTE SURFACES IN EACH SAID FLANGE DIVERGING OUTWARDLY FROM SAID CORE TO THE PERIPHERY OF EACH SAID FLANGE, SAID SURFACE DEFINING OBLIQUE CO-AXIAL RECESSES IN EACH SAID FLANGE WHEREBY A FILM EXTENSION IS FREELY EJECTED FROM SAID RECESSES UPON ROTATION OF SAID SPOOL IN A GIVEN DIRECTION.
References Cited (Backward Citations)
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 |