US1047540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of tungsten filaments for incandescent electric lamps.
Assignee: Individual
•
Filing: 1906-04-10
•
Granted: 1912-12-17
•
Expires: 1926-04-10
Abstract
No abstract record available.
Inventors
- 👤 Anton Lederer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:18
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122
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) | 1915-12-17 | 1916-06-17 | 1916-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-12-17 | 1920-06-17 | 1920-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-12-17 | 1924-06-17 | 1924-12-17 | $7700.00 | Window Closed / Lapsed |