US845670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum apparatus.
Assignee: General Electric Vapor Lamp Co
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Filing: 1904-01-23
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Granted: 1907-02-26
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Expires: 1924-01-23
Abstract
No abstract record available.
Inventors
- 👤 Percy H Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:14
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; B; B65; B65B; B65B27/00; B65B27/12; B65B27/125
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) | 1910-02-25 | 1910-08-27 | 1911-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-02-25 | 1914-08-27 | 1915-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-02-25 | 1918-08-27 | 1919-02-26 | $7700.00 | Window Closed / Lapsed |