US3521828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: SEYMOUR ELECTRONICS AND AUTOMATION Inc A KA CORP
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Filing: 1968-01-08
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Granted: 1970-07-28
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Expires: 1988-01-08
Abstract
No abstract record available.
Inventors
- 👤 William G Campbell Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:27
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/662; G06; G06K; G06K13/00; G06K13/18; G06K13/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2048382A
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US2147776A
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US2146835A
Cited
US2846160A
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US3045941A
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US3025016A
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US3143313A
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US3288391A
Cited
US3409244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |