US3469047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit-interrupting devices using activated carbon
Assignee: Westinghouse Electric Corp
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Filing: 1965-10-22
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Granted: 1969-09-23
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Daniel Berg
- 👤 Thomas W Dakin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:40
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/02; H01T1/08; H01T1/10; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/12; H01H33/121; H01H33/125; H01H33/126; H01H33/70; H01H33/7007; H01H33/76; H01H33/88; H01H33/90; H01H33/91
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) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |