US3426228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1965-02-26
•
Granted: 1969-02-04
•
Expires: 1985-02-26
Abstract
No abstract record available.
Inventors
- 👤 Ian Torrance Barrie
- 👤 Eric Nield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:20
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/308; H01B3/44; H01B3/441; H01B3/442; H01B3/448; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |