Patent US2931023A successfully refreshed from Google Patents.
US2931023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital position indicator
Assignee: International Business Machines Corp
•
Filing: 1955-02-14
•
Granted: 1960-03-29
•
Expires: 1975-02-14
Abstract
No abstract record available.
Inventors
- 👤 Edward A Quade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:42
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204; G01D5/2073; G01D5/25; G01D5/252; G06; G06M; G06M1/00; G06M1/27; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US739572A
Cited
US1102990A
Cited
US1972987A
Cited
US2435276A
Cited
US2602660A
Cited
US2508526A
Cited
US2882524A
Cited
US2672605A
Cited
US2736881A
Cited
US2717371A
Cited
US2734182A
Cited
US2733860A
Cited
FR1071210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |