US3540266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive mechanical weld tracker
Assignee: United States Steel Corp
•
Filing: 1967-10-03
•
Granted: 1970-11-17
•
Expires: 1987-10-03
Abstract
No abstract record available.
Inventors
- 👤 Ernest V Lofgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:41
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/032; B23K9/0325
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
SU185534A1
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US3077768A
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US3056285A
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US3056286A
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US3121325A
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US3105380A
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US3289468A
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US3350925A
Cited
US3413843A
Cited
US3455150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |