US2477894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for forming and welding contacts
Assignee: Individual
•
Filing: 1948-04-23
•
Granted: 1949-08-02
•
Expires: 1968-04-23
Abstract
No abstract record available.
Inventors
- 👤 Albert F Pityo
- 👤 Jr Harry E Butterfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:24
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/04; H01H11/041; H01H11/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806188A
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US2024597A
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US2129845A
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US2164553A
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US2218197A
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US2263294A
Cited
US2388754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |