Patent US2993984A successfully refreshed from Google Patents.
US2993984A
Expired / Lapsed
US
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Gas shielded a. c. arc working
Assignee: Union Carbide Corp
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Filing: 1959-03-25
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Granted: 1961-07-25
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Expires: 1979-03-25
Abstract
No abstract record available.
Inventors
- 👤 Raymond P Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:58
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; Y; Y10; Y10S; Y10S116/00; Y10S116/19
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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |