Patent US2889024A successfully refreshed from Google Patents.
US2889024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equal key trip lever
Assignee: International Business Machines Corp
•
Filing: 1954-12-30
•
Granted: 1959-06-02
•
Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Thurston H Toeppen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:03
CPC Classifications
B; B41; B41J; B41J5/00; B41J5/08; B41J5/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1701376A
Cited
US2362138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |