US2973459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensator relaying assembly
Assignee: Westinghouse Electric Corp
•
Filing: 1957-09-20
•
Granted: 1961-02-28
•
Expires: 1977-09-20
Abstract
No abstract record available.
Inventors
- 👤 William K Sonnemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:22
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/42; H02H3/425; H02H3/40; H02H3/405; H02H7/00; H02H7/26; H02H7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1752947A
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US1816771A
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US1963193A
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US1939044A
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US2221602A
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US2295398A
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US2354152A
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US2408208A
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US2426062A
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GB585516A
Cited
US2445429A
Cited
US2479345A
Cited
US2743396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |