US1439123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making electrical resistance units and the like
Assignee: Cutler Hammer Manufacturing Co
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Filing: 1920-10-27
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Granted: 1922-12-19
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Expires: 1940-10-27
Abstract
No abstract record available.
Inventors
- 👤 Linwood T Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:02
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/02; H01C1/034
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) | 1925-12-18 | 1926-06-19 | 1926-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-18 | 1930-06-19 | 1930-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-18 | 1934-06-19 | 1934-12-19 | $7700.00 | Window Closed / Lapsed |