Patent US2426609A successfully refreshed from Google Patents.
US2426609A
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US
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Dielectric materials
Assignee: AT&T Inc
•
Filing: 1943-08-10
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Granted: 1947-09-02
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Expires: 1963-08-10
Abstract
No abstract record available.
Inventors
- 👤 Frank B Hodgdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:11
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/206; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US503424A
Cited
US1286043A
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US2104488A
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US2177266A
Cited
FR834207A
Cited
US2279762A
Cited
US2292065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |