US2647974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch contact assembly
Assignee: Arrow Hart and Hegeman Electric Co
•
Filing: 1950-12-01
•
Granted: 1953-08-04
•
Expires: 1970-12-01
Abstract
No abstract record available.
Inventors
- 👤 Harold E Schleicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:00
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/20; H01H50/00; H01H50/54; H01H50/546
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1307189A
Cited
US1928846A
Cited
GB418767A
Cited
US2109299A
Cited
US2562420A
Cited
US2583139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |