US2796558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicator device
Assignee: International Business Machines Corp
•
Filing: 1955-10-24
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Granted: 1957-06-18
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Expires: 1975-10-24
Abstract
No abstract record available.
Inventors
- 👤 Robert B Koehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:14
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/40; H01J17/48; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0067; H01J2893/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1787689A
Cited
US1863702A
Cited
US2309525A
Cited
US2445782A
Cited
US2294910A
Cited
US2612617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |