US2441056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc conversion apparatus
Assignee: Standard Oil Co
•
Filing: 1944-05-04
•
Granted: 1948-05-04
•
Expires: 1964-05-04
Abstract
No abstract record available.
Inventors
- 👤 Sam B Becker
- 👤 Paul F Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
H; H03; H03B; H03B11/00; Y; Y10; Y10S; Y10S422/00; Y10S422/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1316445A
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US707797A
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US829874A
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FR331315A
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US1051131A
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DE356413C
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GB211125A
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US1887658A
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US1931800A
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US1948240A
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US2320391A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |