US2507428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus
Assignee: Oak Manufacturing Co
•
Filing: 1947-11-19
•
Granted: 1950-05-09
•
Expires: 1967-11-19
Abstract
No abstract record available.
Inventors
- 👤 John H Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:14
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/50; H01H13/56; H01H13/58; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1529; Y10T74/1558; Y10T74/1584
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) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |