US2997361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective electrostatic character printing
Assignee: International Business Machines Corp
•
Filing: 1958-06-25
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Granted: 1961-08-22
•
Expires: 1978-06-25
Abstract
No abstract record available.
Inventors
- 👤 Warren A Christopherson
- 👤 Lloyd C Tidball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/325; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2015570A
Cited
US2035474A
Cited
US2035475A
Cited
US2486985A
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US2716826A
Cited
US2789027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |