Patent US3035232A successfully refreshed from Google Patents.
US3035232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage amplitude checking system
Assignee: Westinghouse Air Brake Co
•
Filing: 1957-09-11
•
Granted: 1962-05-15
•
Expires: 1977-09-11
Abstract
No abstract record available.
Inventors
- 👤 Michael J Draganjac
- 👤 Edward J Kleinhample
- 👤 Peter E Pappas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:25
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1450563A
Cited
US1973520A
Cited
US2437876A
Cited
GB612362A
Cited
US2629000A
Cited
US2686849A
Cited
US2677804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |