Patent US2256734A successfully refreshed from Google Patents.
US2256734A
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Assignee: DELTA STAR ELECTRIC CO
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Filing: 1938-05-12
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Granted: 1941-09-23
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Expires: 1958-05-12
Abstract
No abstract record available.
Inventors
- 👤 Elias S Cornell
- 👤 Stanley C Killian
- 👤 Joseph A Stoos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:11
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-09-22 | 1945-03-24 | 1945-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-22 | 1949-03-24 | 1949-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-22 | 1953-03-24 | 1953-09-23 | $7700.00 | Window Closed / Lapsed |