Patent US2917460A successfully refreshed from Google Patents.
US2917460A
Expired / Lapsed
US
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Powder compositions useful as electroscopic toners
Assignee: International Business Machines Corp
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Filing: 1955-06-17
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Granted: 1959-12-15
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Expires: 1975-06-17
Abstract
No abstract record available.
Inventors
- 👤 Samuel L Solar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:56
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09775; G03G13/00; G03G13/20; G03G9/087; G03G9/08702; G03G9/08706; G03G9/08708; G03G9/08711
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |