Patent US2790858A successfully refreshed from Google Patents.
US2790858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push button three way switch
Assignee: Individual
•
Filing: 1954-08-16
•
Granted: 1957-04-30
•
Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Tseng Hung-Tu
- 👤 Miao Yun Tai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:07
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/72; H01H13/74
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1297996A
Cited
US2086605A
Cited
US2196433A
Cited
US2213845A
Cited
US2331590A
Cited
US2234405A
Cited
US2521561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |