Patent US933027A successfully refreshed from Google Patents.
US933027A
Expired / Lapsed
US
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Abnormal potential-discharging and arc-disrupting device.
Assignee: Individual
•
Filing: 1907-07-11
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Granted: 1909-08-31
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Expires: 1927-07-11
Abstract
No abstract record available.
Inventors
- 👤 Frederic Wm Erickson
- 👤 Frederic W Lord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:56
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/08
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) | 1912-08-30 | 1913-03-01 | 1913-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-08-30 | 1917-03-01 | 1917-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-08-30 | 1921-03-01 | 1921-08-31 | $7700.00 | Window Closed / Lapsed |