Patent US648655A successfully refreshed from Google Patents.
US648655A
Expired / Lapsed
US
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Apparatus for removing deposit of carbon from incandescent-electric-light bulbs.
Assignee: Individual
•
Filing: 1899-11-29
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Granted: 1900-05-01
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Expires: 1919-11-29
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Cushing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:04
CPC Classifications
A; A21; A21B; A21B1/00; A21B1/40; F; F27; F27B; F27B5/00
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) | 1903-05-01 | 1903-10-31 | 1904-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-05-01 | 1907-10-31 | 1908-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-05-01 | 1911-10-31 | 1912-05-01 | $7700.00 | Window Closed / Lapsed |