US1668016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal-wire filament for incandescent electric lamps and the method of winding it
Assignee: NEUE GLUHLAMPEN GmbH
•
Filing: 1926-02-23
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Granted: 1928-05-01
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Expires: 1946-02-23
Abstract
No abstract record available.
Inventors
- 👤 Hauschild Max
- 👤 Berger Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:14
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/04; H; H01; H01K; H01K1/00; H01K1/02; H01K1/14; H01K3/00; H01K3/02; H01K3/04; Y; Y10; Y10S; Y10S72/00; Y10S72/702; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; 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) | 1931-05-01 | 1931-10-31 | 1932-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-05-01 | 1935-10-31 | 1936-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-05-01 | 1939-10-31 | 1940-05-01 | $7700.00 | Window Closed / Lapsed |