Patent US1226470A successfully refreshed from Google Patents.
US1226470A
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US
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Refractory-metal tube.
Assignee: General Electric Co
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Filing: 1915-02-20
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Granted: 1917-05-15
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Expires: 1935-02-20
Abstract
No abstract record available.
Inventors
- 👤 William D Coolidge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:43
CPC Classifications
B; B22; B22F; B22F5/00; B22F5/10; B22F5/106; B22F3/00; B22F3/02; B22F3/04; B22F3/045; B22F2998/00; B22F2998/10; Y; Y10; Y10S; Y10S29/00; Y10S29/031; Y10S425/00; Y10S425/019; Y10S76/00; Y10S76/11; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12812
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) | 1920-05-14 | 1920-11-13 | 1921-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-05-14 | 1924-11-13 | 1925-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-05-14 | 1928-11-13 | 1929-05-15 | $7700.00 | Window Closed / Lapsed |