US3416971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filamentary thermal cell with ionically conductive glass coating
Assignee: Whittaker Corp
•
Filing: 1965-07-26
•
Granted: 1968-12-17
•
Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Irving J Hutkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:29
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1506962A
Cited
US2622116A
Cited
GB800550A
Cited
US2805272A
Cited
US3020325A
Cited
US3089339A
Cited
US3306833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |