US2868455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: International Business Machines Corp
•
Filing: 1954-09-30
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Granted: 1959-01-13
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Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 George D Bruce
- 👤 Paul F Eckelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:19
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR964113A
Cited
US2584811A
Cited
US2519184A
Cited
US2584363A
Cited
US2531076A
Cited
FR1041803A
Cited
FR1086430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |