US921893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple operation of vapor electric devices.
Assignee: General Electric Co
•
Filing: 1905-09-18
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Granted: 1909-05-18
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Expires: 1925-09-18
Abstract
No abstract record available.
Inventors
- 👤 Robert E Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/08
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) | 1912-05-17 | 1912-11-16 | 1913-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-05-17 | 1916-11-16 | 1917-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-05-17 | 1920-11-16 | 1921-05-18 | $7700.00 | Window Closed / Lapsed |