US2416830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron-graphite contact
Assignee: Individual
•
Filing: 1942-11-28
•
Granted: 1947-03-04
•
Expires: 1962-11-28
Abstract
No abstract record available.
Inventors
- 👤 Heuberger Josef Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:29
CPC Classifications
B; B60; B60L; B60L5/00; B60L5/04; B60L5/08; B60L5/085; B60L2200/00; B60L2200/26; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12479
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US838177A
Cited
GB150120A
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US1685919A
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US1589160A
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US1804067A
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US1980540A
Cited
US2147460A
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US2055832A
Cited
US2185268A
Cited
US2169154A
Cited
US2185257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-03 | 1950-09-02 | 1951-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-03 | 1954-09-02 | 1955-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-03 | 1958-09-02 | 1959-03-04 | $7700.00 | Window Closed / Lapsed |