Patent US2600938A successfully refreshed from Google Patents.
US2600938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping switch
Assignee: Unisys Corp
•
Filing: 1949-09-20
•
Granted: 1952-06-17
•
Expires: 1969-09-20
Abstract
No abstract record available.
Inventors
- 👤 Emil F Thierfelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:22
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/46; G06F7/462; G06F7/465; H; H01; H01H; H01H67/00; H01H67/02; H01H67/04; H01H67/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US498291A
Cited
US1324401A
Cited
US330244A
Cited
US974955A
Cited
US1200885A
Cited
US1168003A
Cited
US1472465A
Cited
US1533188A
Cited
US1437267A
Cited
US1731977A
Cited
GB343983A
Cited
AT133056B
Cited
US1954092A
Cited
US2025534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |