US2984893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an electrical contact
Assignee: Engelhard Industries Inc
•
Filing: 1958-07-15
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Granted: 1961-05-23
•
Expires: 1978-07-15
Abstract
No abstract record available.
Inventors
- 👤 Howard E Spooner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:41
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/04; H01H1/00; H01H1/02; H01H1/021; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921; Y10T29/49826; Y10T29/49945
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2226944A
Cited
US2261412A
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US2373861A
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US2392917A
Cited
US2434321A
Cited
GB609035A
Cited
US2625737A
Cited
US2708249A
Cited
US2854074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |