US3542994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc gap control apparatus for flash welding
Assignee: McKay Machine Co
•
Filing: 1968-09-04
•
Granted: 1970-11-24
•
Expires: 1988-09-04
Abstract
No abstract record available.
Inventors
- 👤 James F Deffenbaugh
- 👤 Richard L Curtner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:09
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/04; B23K11/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB475238A
Cited
DE693189C
Cited
US2727969A
Cited
US2882437A
Cited
US3068350A
Cited
US2939065A
Cited
US3167632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |