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US1415984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switchboard lamp
Assignee: Westinghouse Electric Corp
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Filing: 1920-07-15
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Granted: 1922-05-16
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Expires: 1940-07-15
Abstract
No abstract record available.
Inventors
- 👤 James M Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:46
CPC Classifications
H; H02; H02B; H02B15/00
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) | 1925-05-15 | 1925-11-14 | 1926-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-05-15 | 1929-11-14 | 1930-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-05-15 | 1933-11-14 | 1934-05-16 | $7700.00 | Window Closed / Lapsed |