US3413647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital analog recorder
Assignee: Leeds and Northrup Co
•
Filing: 1963-02-08
•
Granted: 1968-11-26
•
Expires: 1983-02-08
Abstract
No abstract record available.
Inventors
- 👤 Norman E Polster
- 👤 Raymond W Ross
- 👤 Jr Albert J Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:39
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/385; B41J2/39; B41J2/40; B41J2/435; G; G06; G06G; G06G7/00; G06G7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US843189A
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US2719775A
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US3071685A
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US2967083A
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GB864584A
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US3059237A
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US3267485A
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US3149895A
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US3196445A
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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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |