US3354318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop sensing system for magnetic tape transports wherein loop intercepts light beam
Assignee: Ampex Corp
•
Filing: 1964-04-20
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Granted: 1967-11-21
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Sven E Wahlstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:46
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/56; G11B15/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
AN OPTICAL SENSING SYSTEM FOR A VACUUM CHAMBER IN A DIGITAL MAGNETIC TAPE TRANSPORT, SAID CHAMBER INCLUDING SIDE AND BACK WALLS JOINING TO FORM A CORNER WHICH EXTENDS ALONG THE LINE SUBSTANTIALLY PARALLEL TO THE MIDLINE OF THE TAP LOOP, SAID SYSTEM INCLUDING MEANS PRO-
Claim 2
Dependent Claim
45 words
AN OPTICAL SENSING SYSTEM FOR A VACUUM CHAMBER IN A DIGITAL MAGNETIC TAPE TRANSPORT, SAID CHAMBER INCLUDING SIDE AND BACK WALLS JOINING TO FORM A CORNER WHICH EXTENDS ALONG THE LINE SUBSTANTIALLY PARALLEL TO THE MIDLINE OF THE TAP LOOP, SAID SYSTEM INCLUDING MEANS PRO-
References Cited (Backward Citations)
US3197645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |