Patent US3336159A successfully refreshed from Google Patents.
Patent US2607023A successfully refreshed from Google Patents.
US2607023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube circuit means responsive to a signal pulse of short duration
Assignee: Westinghouse Air Brake Co
•
Filing: 1950-04-11
•
Granted: 1952-08-12
•
Expires: 1970-04-11
Abstract
No abstract record available.
Inventors
- 👤 Coughlin William Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
B; B61; B61L; B61L1/00; B61L1/16; B61L1/167; B61L1/02; H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/32; H04Q1/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |