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US2991372A
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Voltage signal comparison means with storage means
Assignee: Westinghouse Air Brake Co
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Filing: 1960-02-08
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Granted: 1961-07-04
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Expires: 1980-02-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas J Blocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:31
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/14; B; B61; B61L; B61L1/00; B61L1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2603689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |