Patent US2220765A successfully refreshed from Google Patents.
US2220765A
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US
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Vitreous material
Assignee: General Electric Co
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Filing: 1938-02-07
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Granted: 1940-11-05
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Expires: 1958-02-07
Abstract
No abstract record available.
Inventors
- 👤 Hirose Mitsuo
- 👤 Kamogawa Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:10
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/129; C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/07; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/087
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) | 1943-11-05 | 1944-05-06 | 1944-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-05 | 1948-05-06 | 1948-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-05 | 1952-05-06 | 1952-11-05 | $7700.00 | Window Closed / Lapsed |