Patent US3409756A successfully refreshed from Google Patents.
US3409756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal arc working
Assignee: L-Tec Co
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Filing: 1965-01-27
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Granted: 1968-11-05
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Expires: 1985-01-27
Abstract
No abstract record available.
Inventors
- 👤 August F Manz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:31
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/16; B23K9/173; B23K9/02; B23K9/0216; B23K9/09; B23K9/10; B23K9/1006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |