US3438591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless tape cartridge
Assignee: AMERLINE CORP
•
Filing: 1966-06-24
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Granted: 1969-04-15
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Expires: 1986-06-24
Abstract
No abstract record available.
Inventors
- 👤 Robert Becker
- 👤 Arnold P Hultgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:45
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/06; B; B65; B65H; B65H75/00; B65H75/02; B65H75/04; B65H75/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2922642A
Cited
US2951654A
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US3161362A
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US3236468A
Cited
US3259331A
Cited
US3326484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |