US1082933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten and method of making the same for use as filaments of incandescent electric lamps and for other purposes.
Assignee: General Electric Co
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Filing: 1912-06-19
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Granted: 1913-12-30
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Expires: 1932-06-19
Abstract
No abstract record available.
Inventors
- 👤 William D Coolidge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:06
CPC Classifications
B; B22; B22F; B22F5/00; B22F5/12; C; C22; C22C; C22C1/00; C22C1/04; C22C1/045; B22F2998/00; B22F2998/10; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431
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) | 1916-12-29 | 1917-06-30 | 1917-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-12-29 | 1921-06-30 | 1921-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-12-29 | 1925-06-30 | 1925-12-30 | $7700.00 | Window Closed / Lapsed |