US2911591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing instrument transformers
Assignee: KNOPP Inc
•
Filing: 1958-08-15
•
Granted: 1959-11-03
•
Expires: 1978-08-15
Abstract
No abstract record available.
Inventors
- 👤 Wilson S Pritchett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:03
CPC Classifications
G; G01; G01R; G01R35/00; G01R35/02; G01R31/00; G01R31/50; G01R31/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2566140A
Cited
US2666895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |