Patent US655176A successfully refreshed from Google Patents.
US655176A
Expired / Lapsed
US
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Electric-arc lamp.
Assignee: Individual
•
Filing: 1899-10-20
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Granted: 1900-08-07
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Expires: 1919-10-20
Abstract
No abstract record available.
Inventors
- 👤 Johann Friedrich Ackerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:57
CPC Classifications
H; H01; H01J; H01J11/00; H01J11/20; H01J11/22; G; G01; G01N; G01N30/00; G01N30/02; G01N30/62; G01N30/64; G01N2030/642
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) | 1903-08-07 | 1904-02-06 | 1904-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-08-07 | 1908-02-06 | 1908-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-08-07 | 1912-02-06 | 1912-08-07 | $7700.00 | Window Closed / Lapsed |