US3428846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure of tubes of refractory oxide material
Assignee: The General Electric Company PLC
•
Filing: 1965-12-30
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Granted: 1969-02-18
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Expires: 1985-12-30
Abstract
No abstract record available.
Inventors
- 👤 Sydney A R Rigden
- 👤 John B Whiscombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:15
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/36; H01J61/361; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C22; C22C; C22C16/00; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/403; C04B2237/50; C04B2237/62; C04B2237/64; C04B2237/70; C04B2237/704; C04B2237/708; C04B2237/72; C04B2237/76; C04B2237/765; C04B2237/80; C04B2237/84; C04B2237/88
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |