US2780718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spot welding tip
Assignee: Ampco Metal Inc
•
Filing: 1953-03-09
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Granted: 1957-02-05
•
Expires: 1973-03-09
Abstract
No abstract record available.
Inventors
- 👤 Henry A Mullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:26
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; B23K11/00; B23K11/30; B23K11/3009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563592A
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US1288376A
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US1360897A
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US1735983A
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US2234486A
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US2355145A
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US2374284A
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GB595585A
Cited
US2440463A
Cited
US2442798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |