US2787688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact material
Assignee: North Electric Co
•
Filing: 1951-07-10
•
Granted: 1957-04-02
•
Expires: 1971-07-10
Abstract
No abstract record available.
Inventors
- 👤 Donivan L Hall
- 👤 Arthur E Middleton
- 👤 Earl R Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:29
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
24 words
IN AN ELECTRICAL CONTACT MEMBER, THE COMBINATION OF A CURRENT CONDUCTING BASE AND A SOLID STATE ALLOY SURFACE CONSISTING ESSENTIALLY OF PALLADIUM AND ZINC.
References Cited (Backward Citations)
US1832307A
Cited
US1935897A
Cited
US2300286A
Cited
US2303405A
Cited
US2384501A
Cited
US2379641A
Cited
US2501164A
Cited
US2428959A
Cited
US2413604A
Cited
US2432657A
Cited
US2545352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |