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US3422754A
Expired / Lapsed
US
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Printing assembly controlled by electric pulses
Assignee: Zent Inst Iztchislitelna Tech
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Filing: 1967-02-08
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Granted: 1969-01-21
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Expires: 1987-02-08
Abstract
No abstract record available.
Inventors
- 👤 Stefan T Bakardjiev
- 👤 Ivan Tenev Stantchev
- 👤 Dubomir Iordanov Antonov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:10
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1195992A
Cited
US1978330A
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US2417865A
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US2576041A
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US3019724A
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US3156181A
Cited
US3173359A
Cited
US3269510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |