US2437220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum connection parts treated with concentrated nitric acid
Assignee: FCI USA LLC
•
Filing: 1943-06-26
•
Granted: 1948-03-02
•
Expires: 1963-06-26
Abstract
No abstract record available.
Inventors
- 👤 Bonwitt Wilhelm Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:20
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1045718A
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US1330581A
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US1410391A
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US1863429A
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US2098256A
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US2102214A
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US2127469A
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US2179693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-02 | 1951-09-01 | 1952-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-02 | 1955-09-01 | 1956-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-02 | 1959-09-01 | 1960-03-02 | $7700.00 | Window Closed / Lapsed |