US2710368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic differential relay systems
Assignee: Individual
•
Filing: 1950-07-25
•
Granted: 1955-06-07
•
Expires: 1970-07-25
Abstract
No abstract record available.
Inventors
- 👤 Donald L Wylie
- 👤 Donald J Marihart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:30
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/28; H02H3/30; H02H3/307
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2183646A
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US2462799A
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US2523813A
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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) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |