US936403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making filaments for electric incandescent lamps.
Assignee: Siemens and Halske AG
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Filing: 1906-10-02
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Granted: 1909-10-12
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Expires: 1926-10-02
Abstract
No abstract record available.
Inventors
- 👤 Werner Von Bolton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:13
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/04; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
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) | 1912-10-11 | 1913-04-12 | 1913-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-10-11 | 1917-04-12 | 1917-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-10-11 | 1921-04-12 | 1921-10-12 | $7700.00 | Window Closed / Lapsed |